The reason that there are more quality foreign students students in Thailand because the country of study abroad students, but only what is needed and not a very deep class, students are stressed. So foreign students can learn and understand.
Why foreign students better than students in the study because studies abroad, but necessary, and not so much that students learn deeply strained. As a result, foreign students can learn and understand them fully.
The reason that foreign students have more quality in students study abroad because of that class but necessary and not studying deep enough to make student stress.