Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
chung cong » nhung cong, chong cong, phung cong
thang tu » thong tu, thanh tu, hang tu
tu chung » tu vung, tu cong
cong tac » cong ty
tac dan » tac danh, cac dan, tac da

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 sach) OR (chieu sang)) - thanh thang tu chung cong tac dan ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sach) OR (chieu sang)) - thanh thang tu chung cong tac dan ca".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) OR (chieu sang)) - thanh thang tu chung cong tac dan ca*.