Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hieu quan » hieu qua, lieu quan, thien quan
trung dap » trung cap, trung dai, trung dam
cong dang » cong dong, cong dung, cong danh
thanh ban » thanh san, thanh van, thanh bac
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan

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 quan - hanh trung dap ung ((cong dang) or (cong dan)) thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu quan - hanh trung dap ung ((cong dang) OR (cong dan)) thanh ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu quan - hanh trung dap ung ((cong dang) or (cong dan)) thanh ban*.