Perhaps you should try some spelling variations:
quyen tap » tuyen tap, quyen cap, huyen tam
luyen tap » tuyen tap, luyen thi
cong cong » cong dong, trong cong, dung cong
cac chu » cac thu, cac che, cac khu
ban vat » bang vat, ben vat, ban va
te cong » tai cong, thi cong, thu cong
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 (luyen tap)) cac chu đe co ban vat y te cong cong~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen tap) OR (luyen tap)) cac chu đe co ban vat y te cong cong".
• Adding a wildcard symbol may retrieve word variants: ((quyen tap) OR (luyen tap)) cac chu đe co ban vat y te cong cong*.