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
bang vat » bang va, dang vat, cang vat
te trong » le trong, ke trong, te thuong
co bang » cao bang, con bang, co ban
vat y » vat ly, vat _

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 bang vat y te trong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen tap) OR (quyen cap)) cach thuc đe co bang vat y te trong cong.
• Adding a wildcard symbol may retrieve word variants: ((quyen tap) or (quyen cap)) cach thuc đe co bang vat y te trong cong*.