Perhaps you should try some spelling variations:
tran thanh » quan thanh
nhung cong » dung cong, thong cong, hang cong
van thanh » van tuan
ban thanh » ban hanh, ban hang
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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: hoc ((((tran thanh) OR (van thanh))) or (ban thanh)) - canh tranh va nhung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((tran thanh) OR (van thanh))) OR (ban thanh)) - canh tranh va nhung cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((tran thanh) OR (van thanh))) or (ban thanh)) - canh tranh va nhung cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((((tran thanh) OR (van thanh))) or (ban thanh)) - canh tranh va nhung cong tan toan cao*.