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
cac kieu » cach tieu, cac yeu, tac kiem
ban ke » ban kem, ban ve, ban le
y thuc » ty thuc, y thuoc, _ thuc
y thu » ly thu, ky thu, _ thu

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