Perhaps you should try some spelling variations:
dung cong » dung trong
tien anh » tien manh, dien anh, tien thanh
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien anh) or (tieng anh)) - canh tranh va dung cong tan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (tieng anh)) - canh tranh va dung cong tan chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (tieng anh)) - canh tranh va dung cong tan chan cau*.