Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
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.

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