Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tung » thanh cong
tung tuan » trung tuan, hung tuan, quang tuan
tuan hung » tran hung, luan hung, tuan dung
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
thanh dau » thanh dat, thanh dam, thanh mau

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 sach) OR (chieu sang)) - thanh tung tuan hung ((cong cong) or (dung cong)) thanh dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - thanh tung tuan hung ((cong cong) OR (dung cong)) thanh dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chieu sang)) - thanh tung tuan hung ((cong cong) or (dung cong)) thanh dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chieu sang)) - thanh tung tuan hung ((cong cong) or (dung cong)) thanh dau*.