Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dung » thanh dung, hanh dong, manh dung
luan hung » luan chung, lan hung, luan ung
anh dung » anh dong, anh huong, sach dung
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((hanh dung) or (anh dung)) luan hung ((cong dong) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh dung) OR (anh dung)) luan hung ((cong dong) OR (cong tan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh dung) or (anh dung)) luan hung ((cong dong) or (cong tan)) toan cao*.