Perhaps you should try some spelling variations:
manh dung » manh hung, manh tung, anh dung
hanh dong » anh dong, ha dong
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
theo chu » theo chieu, cho chu, chao chu
chu sang » chu bang, thu sang, chieu sang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » 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: theo chu sang - ((manh dung) or (hanh dong)) luan nang cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sang - ((manh dung) OR (hanh dong)) luan nang cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chu sang - ((manh dung) or (hanh dong)) luan nang cong dan toan cau*.