Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, huyen tam
quyen cap » quyen cach, huyen cao, quyen con
dung cong » dung trong
thi dung » thi huong, thi nhung, thi cong
cac thu » cach thuc, cac thoi
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: ((quyen tap) OR (quyen cap)) cac thu đe co ban vat y thi dung cong~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen tap) OR (quyen cap)) cac thu đe co ban vat y thi dung cong".
• Adding a wildcard symbol may retrieve word variants: ((quyen tap) OR (quyen cap)) cac thu đe co ban vat y thi dung cong*.