Perhaps you should try some spelling variations:
huyen tam » huyen nam, huyen dam, chuyen tay
quyen cap » quyen cach, huyen cao, quyen con
cach thuc » anh thuc, cac thu
cong cong » cong dong, trong cong, dung cong
thi cong » tai cong, thien cong
ban vat » bang vat, ben vat, ban va
vat y » vat ly, vat _
y thi » ky thi, y thai, ly thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((huyen tam) or (quyen cap)) cach thuc đe co ban vat y thi cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((huyen tam) OR (quyen cap)) cach thuc đe co ban vat y thi cong cong.
• Adding a wildcard symbol may retrieve word variants: ((huyen tam) or (quyen cap)) cach thuc đe co ban vat y thi cong cong*.