Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh
luat dong » luat cong, luat bong, luan dong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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) OR (hanh chinh)) luat dong ((cong tan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - ((hanh trinh) OR (hanh chinh)) luat dong ((cong tan) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - ((hanh trinh) OR (hanh chinh)) luat dong ((cong tan) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - ((hanh trinh) OR (hanh chinh)) luat dong ((cong tan) or (cong san)) toan ban*.