Perhaps you should try some spelling variations:
cuong dung » tuong duong, ung dung, thong dung
quyen tap » tuyen tap, luyen tap, quyen cap
cong cong » cong dong, trong cong, dung cong
cac chu » cac thu, cac khu, ca chu
cac che » cac he, cac chien, cac chat
co ben » co benh, co ban, do ben
vat ky » vat ly, va ky, vat y

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 ((cac chu) or (cac che)) đe co ben vat ky thi ((cong cong) or (cuong dung))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((cac chu) OR (cac che)) đe co ben vat ky thi ((cong cong) OR (cuong dung)).
• Adding a wildcard symbol may retrieve word variants: quyen tap ((cac chu) or (cac che)) đe co ben vat ky thi ((cong cong) or (cuong dung))*.