Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hoc khien » hoc hien, hoc nghien, hoc thieu
manh hung » anh huong
cong vang » cong quang, cong ngang, cong san
cong lang » cong luong, cong quang, cong ngang
va thong » va thuong, va phuong, he thong
toan cao » toan ban, toan tap
hung va » huong va, hung van, hang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien tinh - manh hung va thong ((cong vang) or (cong lang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - manh hung va thong ((cong vang) OR (cong lang)) toan cao*.