Perhaps you should try some spelling variations:
luyen tap » tuyen tap, luyen thi
cach thuc » cac thu
cong cong » cong dong, dung cong, dang cong
anh thuc » am thuc, dan thuc, anh tu
bang vat » bang va, dang vat, cang vat
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: luyen tap ((cach thuc) or (anh thuc)) đe co bang vat y te ((cong cong) OR (trong cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: luyen tap ((cach thuc) OR (anh thuc)) đe co bang vat y te ((cong cong) OR (trong cong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "luyen tap ((cach thuc) or (anh thuc)) đe co bang vat y te ((cong cong) OR (trong cong))".
• Adding a wildcard symbol may retrieve word variants: luyen tap ((cach thuc) or (anh thuc)) đe co bang vat y te ((cong cong) OR (trong cong))*.