Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, huyen tam
quyen cap » quyen cach, huyen cao, quyen con
cong cong » cong dong, trong cong, dung cong
tac kiem » tac ke, thi kiem, va kiem
thi cong » tai cong, thien cong
ban ve » ban va
y thi » ky thi, y thai, ly thi

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)) tac kiem đe co ((ban le) or (ban ve)) y thi cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen tap) OR (quyen cap)) tac kiem đe co ((ban le) OR (ban ve)) y thi cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen tap) OR (quyen cap)) tac kiem đe co ((ban le) or (ban ve)) y thi cong cong".
• Adding a wildcard symbol may retrieve word variants: ((quyen tap) OR (quyen cap)) tac kiem đe co ((ban le) or (ban ve)) y thi cong cong*.