Why I can't get a PhD offer?
Getting an offer for a PhD program can be difficult, and if you are receiving repeated rejections it may be worth seeking some feedback on your applications. 
 Given that your undergraduate degree is from a non-English speaking country, if you are applying for PhD candidature in England or the US (or some other English-speaking country), you will need to make sure your writing is clear and grammatically polished.  That is a major aspect of what professors are looking for when seeking research candidates.

Without wishing to be unnecessarily critical, I note that in your three-sentence question in this post I can see two obvious spelling errors and at least one major grammatical error.  This might just be because you are writing while upset, or it might be indicative of a low standard of written English.  If the latter, I would suggest you engage in some practice writing essays and other papers in English and getting feedback on your work until you have improved your writing.  This may assist you in future applications.  Good luck.