Question: How should I get In Toefl to enter USA universities?and How foregin students can study there? 

Answer: TOEFL stands for Test of English as a Foreign Language.  Below is a link to their site so that you can figure out when/where you can take it.  Each school's TOEFL score requirements will vary.  There are many books out there about getting into US colleges - I'm sure at least some of those would have additional information regarding admissions of foreign students.  Good luck!
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