Perhaps you should try some spelling variations:
quyen cach » quyen sach, quyen anh
quyen cap » huyen cao, quyen con, quyen cua
luyen tap » tuyen tap, luyen thi
cach thoi » cac thoi, cach thuc, cach noi
te cong » tai cong, thi cong, thu cong
ban ve » ban va
ve ky » va ky, ke ky
ky te » y te, ky le, ly te
dong* » dung*

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((quyen cap) OR (quyen cach))) or (luyen tap)) cach thoi đe co ban ve ky te cong dong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((quyen cap) OR (quyen cach))) OR (luyen tap)) cach thoi đe co ban ve ky te cong dong*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((quyen cap) OR (quyen cach))) or (luyen tap)) cach thoi đe co ban ve ky te cong dong*".