Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tang » hanh trang, anh tang, hanh mang
cong cong » cong dong, trong cong, dung cong
doc hieu » hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - ((hanh tang) OR (hanh trinh)) cua cong cong tan toan cau~.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sang - ((hanh tang) or (hanh trinh)) cua cong cong tan toan cau*.