Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
che chinh » te chinh
hanh tang » hanh mang, hanh tung, nhanh thang
trong tac » trong cac, tuong tac, trong tan
anh tang » anh bang, anh dang, anh nang
qua dung » quang dung, su dung, qua song
tac toan » tap toan, tam toan, hach toan
toan cau » 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: che chinh sach - ((((hanh tang) or (hanh trang))) or (anh tang)) qua dung trong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: che chinh sach - ((((hanh tang) OR (hanh trang))) OR (anh tang)) qua dung trong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: che chinh sach - ((((hanh tang) or (hanh trang))) or (anh tang)) qua dung trong tac toan cau*.