Perhaps you should try some spelling variations:
chieu tach » chiet tach, chieu sach, chieu tinh
dung cong » dung trong
tranh ve » trinh ve, thanh ve, tranh va
cong san » cong tac
ve dung » ve duong, ve rung, va dung
san tai » sang tai, van tai, han tai
tai tap » bai tap, tai tao, hai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu tach) or (chiu trach)) - canh tranh ve dung cong san tai tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tach) OR (chiu trach)) - canh tranh ve dung cong san tai tap.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tach) or (chiu trach)) - canh tranh ve dung cong san tai tap*.