Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
luan nhung » luan chung, luan hung, quan nhung
cong thanh » dong thanh, cong trinh, truong thanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tap

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