Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hieu manh » hieu nganh, dieu hanh, hien hanh
hanh tran » hanh trang, thanh tran, hanh tram
van thong » van thuong, van phong, va thong
tran van » luan van
cong san » cong tac
hang dau » hang va
hang tai » hang va, dung tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu xanh) or (hieu manh)) - hanh tran van thong cong san ((hang dau) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (hieu manh)) - hanh tran van thong cong san ((hang dau) OR (hang tai)).
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (hieu manh)) - hanh tran van thong cong san ((hang dau) or (hang tai))*.