Perhaps you should try some spelling variations:
thanh chuong » thanh huong, nhanh chong, thanh hung
hieu manh » chieu xanh, hieu nganh, dieu hanh
dai phung » dai khung, dai phong, tai phuong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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 manh - ((thanh chuong) or (thanh cong)) dai phung ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((thanh chuong) OR (thanh cong)) dai phung ((cong dan) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - ((thanh chuong) or (thanh cong)) dai phung ((cong dan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((thanh chuong) or (thanh cong)) dai phung ((cong dan) OR (cong san)) toan cao*.