Perhaps you should try some spelling variations:
thanh dan » thanh san, thanh van, thanh dat
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung
dan va » doan va, dan ca, ban va

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((mot chieu) OR (toc thieu))) OR (ho chieu)) sang - thanh dan va dung cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((((mot chieu) OR (toc thieu))) OR (ho chieu)) sang - thanh dan va dung cong tac toan cao*.