Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
tung vat » dung vat, tang vat, tung va
vat dung » van dung, va dung, viet dung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu xanh) OR (chieu sach))) OR (hieu lang)) - thanh tung vat dung cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((chieu xanh) OR (chieu sach))) or (hieu lang)) - thanh tung vat dung cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu xanh) OR (chieu sach))) or (hieu lang)) - thanh tung vat dung cong tac toan cao*.