Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
huyen cao » khuyen cao, huyen bao, huyen cho
chuc cong » cua cong, thu cong, cac cong
cong cong » cong dong, trong cong, dung cong
cac che » cac he, cac chien, cac chat
ty chuc » ty thuc, toi chuc, ty chung
va ty » van ty, va ky, va tu

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 (huyen cao)) cac che đe co ban va ty chuc cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen tap) OR (huyen cao)) cac che đe co ban va ty chuc cong cong*.