Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hieu manh » chieu xanh, hieu nganh, dieu hanh
cuong bai » uong bi, cuong ma
hoc hieu » hoc thieu, hoc hien, doc hieu
van nang » van quang, van ban, van dung
bai toan » bai tap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh tran ((van nang) or (van dong)) cuong bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh tran ((van nang) OR (van dong)) cuong bai toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh tran ((van nang) or (van dong)) cuong bai toan cao*.