Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trang » thanh trung, canh tranh, hanh trinh
trang van » tran van, trang va, trong van
van nhung » van nhuong, va nhung, van hung
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, cong dong
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao

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

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