Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thanh tong » thanh cong, thanh tung, thanh long
nhung cong » thong cong, hang cong, nhung don
tong quan » thong quan, tong luan, luong quan
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cap » thanh lap, hanh cap, 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: hoc ((chieu sang) OR (chieu sach)) - thanh tong quan ((nhung cong) or (dung cong)) tan thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - thanh tong quan ((nhung cong) OR (dung cong)) tan thanh cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - thanh tong quan ((nhung cong) or (dung cong)) tan thanh cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - thanh tong quan ((nhung cong) or (dung cong)) tan thanh cap*.