Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu xanh, hieu cach
chieu sang » chieu xanh, hieu lang, nhieu tang
trung vat » trung va, trung van, trong vat
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran tap » toan tap, tran tan, tran tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((chieu sach) or (chinh sach))) or (chieu sang)) - thanh trung vat dung cong tac tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sach) OR (chinh sach))) OR (chieu sang)) - thanh trung vat dung cong tac tran tap.
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sach) or (chinh sach))) or (chieu sang)) - thanh trung vat dung cong tac tran tap*.