Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh nang » anh nang, ganh nang, hanh mang
doc hieu » hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
suat » xuat, luat, sua

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