Perhaps you should try some spelling variations:
hoc thieu » hoc hien
canh tran » canh tranh, hanh trang, banh trang
dung dang » dung dan, dung dong, dung danh
tran van » luan van
van dung » van dong, xay dung, tin dung
dang van » hoang van, hang va
van tan » van tuan, van ban, van tai
tan ban » toan ban, tang ban, van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc thieu)) xanh - canh tran van dung dang van tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc thieu)) xanh - canh tran van dung dang van tan ban*.