Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
quyen tai » xuyen tai, nguyen tai, truyen tai
cac chu » cac thu, cac khu, ca chu
cac che » cac he, cac chien, cac chat
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 ((cac chu) OR (cac che)) đe co bang ly ky thu cong cong~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tai ((cac chu) OR (cac che)) đe co bang ly ky thu cong cong*".