Perhaps you should try some spelling variations:
quang thanh » quan thanh, hoang thanh, muong thanh
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tung » thanh cong
tung cong » dung cong, tong cong, truong cong
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu sang)) - nhanh quang thanh tung cong tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - nhanh quang thanh tung cong tac ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - nhanh quang thanh tung cong tac ((toan cau) or (toan tap))*.