Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
than cao » toan cao, thai cao, than cap

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 - hanh ((tang cua) or (mang cua)) khong ((cong tan) or (cong tac)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((tang cua) OR (mang cua)) khong ((cong tan) OR (cong tac)) than cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((tang cua) or (mang cua)) khong ((cong tan) or (cong tac)) than cao*.