Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
dung cong » dung trong
chao chu » cho chu, cua chu, cao cho
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi khi) or (chao chu)) xanh - ((hanh trang) or (canh tranh)) va dung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi khi) OR (chao chu)) xanh - ((hanh trang) OR (canh tranh)) va dung cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((doi khi) or (chao chu)) xanh - ((hanh trang) or (canh tranh)) va dung cong tac toan tap*.