Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, huyen tam
quyen cap » quyen cach, huyen cao, quyen con
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
cac khoi » cac thoi, cac khoan, cach thoi
ban le » ban ve
le may » le mau, ly may, xe may

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) or (quyen cap)) cac khoi đe co ban le may tinh ((hang cong) or (dung cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen tap) OR (quyen cap)) cac khoi đe co ban le may tinh ((hang cong) OR (dung cong)).
• Adding a wildcard symbol may retrieve word variants: ((quyen tap) or (quyen cap)) cac khoi đe co ban le may tinh ((hang cong) or (dung cong))*.