Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
manh cua » doanh cua
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran van » luan van
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chieu sach)) - hanh ((manh cua) OR (ban cua)) dung cong tac tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh ((manh cua) OR (ban cua)) dung cong tac tran van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - hanh ((manh cua) OR (ban cua)) dung cong tac tran van".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh ((manh cua) OR (ban cua)) dung cong tac tran van*.