Perhaps you should try some spelling variations:
thanh trung » thanh tung
doi chieu » doc hieu, ho chieu, mot chieu
cua rung » cua trung, cua rang, cua truong
qua dung » quang dung, su dung, qua song
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doi chi)) xanh - thanh trung ((cua rung) or (qua dung)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - thanh trung ((cua rung) OR (qua dung)) cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - thanh trung ((cua rung) or (qua dung)) cong tac toan cao*.