Perhaps you should try some spelling variations:
dung cong » dung trong
cho sang » cho hang, cho san, cao sang
cao bang » cao dang, cao tang, cao nang
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
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: cao ((cho sang) or (cao bang)) - canh tranh va dung cong dan ((phan cau) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cao ((cho sang) OR (cao bang)) - canh tranh va dung cong dan ((phan cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cao ((cho sang) or (cao bang)) - canh tranh va dung cong dan ((phan cau) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: cao ((cho sang) or (cao bang)) - canh tranh va dung cong dan ((phan cau) OR (phan dau))*.