Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
cong luong » cong thuong, nang luong, cong cong
hanh tang » hanh trang, anh tang, hanh mang
doc hieu » toc thieu, hoc thieu, hoc hien
tang cua » mang cua, hang cua, tang luan
hanh cac » hang cac, hanh cat, hanh cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu nganh - hanh tang cua cong ((cong luong) or (cong dong)) hanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - hanh tang cua cong ((cong luong) OR (cong dong)) hanh cac*.