Perhaps you should try some spelling variations:
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, mot chieu
trong tac » trong cac, tuong tac, trong tan
ho chieu » theo chieu, hoc thieu, mot chieu
tung vat » dung vat, tang vat, tung va
vat dung » van dung, va dung, viet dung
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) xanh - thanh tung vat dung trong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - thanh tung vat dung trong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - thanh tung vat dung trong tac toan ban*.