Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
van manh » van minh, van anh, van thanh
van hanh » van thanh, ban hanh, van anh
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 tinh - ((((van manh) or (van hanh))) or (canh tranh)) cua nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - ((((van manh) OR (van hanh))) OR (canh tranh)) cua nhung cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - ((((van manh) or (van hanh))) or (canh tranh)) cua nhung cong dan than cau*.