Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dang cong
quyen tai » xuyen tai, nguyen tai, truyen tai
dung cong » dung trong
cuc chu » cua chu, cac chu, cuc thue
co bang » cao bang, con bang, co ban
bang ly » hang ly
ky thu » ly thu, ky thi, ky thuat
ly ky » ly 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 tai cuc chu đe co bang ly ky thu ((cong cong) or (dung cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tai cuc chu đe co bang ly ky thu ((cong cong) OR (dung cong))*.