Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
tranh cai » tranh cac, trinh cai, tranh chap
dung cong » dung trong
dien anh » tieng anh, dien dan
cai dung » mai dung, cao dung, cap dung
cong tac » cong ty
tac van » tac vang, cac van, tac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: duc ((tien thanh) or (dien anh)) - canh tranh cai dung cong tac van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: duc ((tien thanh) OR (dien anh)) - canh tranh cai dung cong tac van ban.
• Adding a wildcard symbol may retrieve word variants: duc ((tien thanh) or (dien anh)) - canh tranh cai dung cong tac van ban*.