Copyscape là một tool check nội dung trùng lặp rất tốt từ trước tới giờ, nhưng dạo này nó có vấn đề: với cùng một nội dung, check bằng Copyscape thì không ra kquả trùng lặp nhưng với SmallSeoTool thì lại trả về 0% Unique. Mình ktra với content trong link dưới đây ( link này đã được Google index ) Mã:http://www.conyeucha.com/2016/07/tui-suoi-thien-thanh-nguoi-ban-huu-ich-trong-mua-dong.htmlMình mail trực tiếp với CopyScape và được trả lời lần lượt như sau: Mình Content in site below is already indexed, but Copyscape still found no index for the same text. Please check it! URL:Mã:http://www.conyeucha.com/2016/07/tui-suoi-thien-thanh-nguoi-ban-huu-ich-trong-mua-dong.htmlCopyscape Hello, Thank you for your message, we are happy to be of assistance. We would like to point out that as our products rely on the Google web indexes to locate matching content, there may be some websites, (or web-pages) containing duplicate content that have not (yet) been included in their indexes and until such time that they are, they will not appear in your results, as would seem to be the case here. On the flip side, if content has been deleted from a website, it can take some time until Google's automatic web-crawlers update their databases to omit the URLs or content that has been taken down, so they will still appear in your list of results. The web indexes that Copyscape Premium uses when performing a search are not the same ones that are used when performing a standardGoogle search. In some instances there may be some differences between these indexes. The indexes we use also get updated at differentintervals to Google's main indexes. Unfortunately, we of course have no control over which websites Google includes into their web indexes or when they get updated. Due to this, we make no claim to catch all possible cases of plagiarism and as such do not provide any certification that the searched content is unique. Our engineering team is actively working on an ongoing basis to improve our duplicate-content detection algorithms and resources so that such cases will be identified in the future. We hope that answers your question satisfactorily. Please let us know if we can be of any further assistance. Best regards, Darren Mình There's a case that I wanna show you that some text is already indexed by Google, but Copyscape did not find it. Please paste this sentence below < which is on the web I gave you at the previous mail > on GG search, you'll find it's indexed, then check it with Copyscape, you'll find no result. "Mỗi khi bị đau nhức cơ do làm việc nhiều dẫn đến quá sức hoặc do thay đổi thời tiết thì nhiều người thường sử dụng dầu để xoa bóp hoặc uống thuốc Tây" Hope you solve this problem ASAP! Best regards! Trung Thành. Copyscape: Hello again, Thank you for your message, we are happy to be of assistance. You seem to have overlooked the following part of our response to your enquiry: The web indexes that Copyscape Premium uses when performing a search are not the same ones that are used when performing astandard Google search. In some instances there may be some differences between these indexes, (as is apparely the case here). Theindexes we use also get updated at different intervals to Google's main indexes. (Unfortunately, we of course have no control over which websites Google includes into their web indexes or when they get updated). So it would seem that although the website/s containing this portion of text may be in Google's regular indexes, quite clearly they have not yet included them in their commercial web indexes that we use to locate duplicate content, and until such time they do, Copyscape will therefore not be able to identify such cases. You could perhaps try getting in touch with Google directly and request that they crawl the website/s for their commercial web indexes enabling Copyscape to be able to locate the matches. Rất cảm ơn ae đã đọc đến đây Trong mail cuối, nó có đề cập đến Google's regular indexes - chỉ mục thông thường và commercial web indexes. Mình k hiểu lắm về 2 loại index này, chả lẽ GG lại có sự phân biệt? Ae nào có cao kiến gì không cho mình xin vài lời khuyên với? Hơn nữa ae dùng copyscape có thấy có vđề như mình ko?