Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
khanh cong » thanh cong, hanh cong, khach cong
trong van » trong cac
van khanh » van thanh, van hanh, van anh
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 xanh) or (chieu sach)) - thanh trong van khanh cong tac dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (chieu sach)) - thanh trong van khanh cong tac dan ca.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (chieu sach)) - thanh trong van khanh cong tac dan ca*.