It’s all about rewriting – I personally tracked some of the blogs with make money, blogging, seo tips – and 99% of blogs are rewriting the topics – there is no harm in rewriting – it is rather good as you can include the missing information or unexplained information.
When you actually rewrite the blog post – you take a theme from topic and write it in your own words – but still it may happen that you might not rank for that particular keyword in the search engine – even your blog post is unique.
This is the common issue and happens to all – to me also. I often find information that is not explicitly written – and its rather confusing for most of the users on Internet.
Method I Tried
Whenever you are rewriting the topics in the sake for search engine rankings – then you should always keep a check on the content and keywords that the original article is having and try to make a better one with your rewrite.
Perform a search and try to summarize points that are favoring the article to rank higher for a particular keyword.
It is not that difficult, as it seems – with 1-2searches and reading that article will surely give you an overview.
Other than the comparison method – You should always have your sitemap ready and submitted to search engine – it always helps in listing your site on search engine.