Perhaps you should try some spelling variations:
trien cong » thien cong
quyen tap » tuyen tap, luyen tap, quyen cap
cong cong » cong dong, trong cong, dung cong
trac chu » tran chau, truc chua, tac cho
cac chu » cac thu, cac che, cac khu
o trien » va trien, o truyen, bo triet
ban ve » ban va
ve o » ve co, ve do, ve so

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

• Performing a fuzzy search may retrieve terms with similar spellings: quyen tap ((trac chu) or (cac chu)) đe co ban ve o trien cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((trac chu) OR (cac chu)) đe co ban ve o trien cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen tap ((trac chu) or (cac chu)) đe co ban ve o trien cong cong*.