Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, huyen tam
quyen cap » quyen cach, huyen cao, quyen con
cach thuc » anh thuc, cac thu
tai trong » tai truong, tai trung, tai cong
ban kem » banh kem, hanh kem, banh keo
ban ke » ban ve, ban le, ban ky
ky tai » ly tai, ky thi, kg tai

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