Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
doc hieu » toc thieu, hoc thieu, hoc hien
cua dong » chua dong, cua dang, cua nong
cong tac » cong ty
tac hanh » tac thanh, tac danh, sac hanh
hanh cat » hanh cac, hanh cham, hanh luat

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 trinh ((cua dong) or (cua cong)) cong tac hanh cat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - hanh trinh ((cua dong) OR (cua cong)) cong tac hanh cat*.