Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
cong cong » cong dong, trong cong, dung cong
cac chu » cac che, ca chu, cac cau
cac thu » cach thuc, cac thoi
cac khu » cac khoi, cac kieu
ban ly » ban lay, bang ly, ban le
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 thu))) or (cac khu)) đe co ban ly ky thu cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tai ((((cac chu) OR (cac thu))) OR (cac khu)) đe co ban ly ky thu cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen tai ((((cac chu) or (cac thu))) or (cac khu)) đe co ban ly ky thu cong cong*.