Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran cao » toan cao, tran chau, trang cho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((thuat sach) OR (thuat lanh)) - hanh tran van nhung ((cong tan) or (cong san)) tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thuat sach) OR (thuat lanh)) - hanh tran van nhung ((cong tan) OR (cong san)) tran cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thuat sach) OR (thuat lanh)) - hanh tran van nhung ((cong tan) or (cong san)) tran cao".
• Adding a wildcard symbol may retrieve word variants: theo ((thuat sach) OR (thuat lanh)) - hanh tran van nhung ((cong tan) or (cong san)) tran cao*.