Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
chi tach » chiu trach, chiet tach, chi thanh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 chi tach - ((hanh tang) or (canh tranh)) va nhung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tach - ((hanh tang) OR (canh tranh)) va nhung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi tach - ((hanh tang) or (canh tranh)) va nhung cong tan toan cao*.