Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
thuc cong » thuoc cong, thu cong, chuc cong
cong cong » cong dong, trong cong, dung cong
cac che » cac he, cac chien, cac chat
cac thu » cach thuc, cac thoi
co bang » cao bang, con bang, co ban
cac chu » cac khu, ca chu, cac cau

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))) or (cac thu)) đe co bang ((ly y) or (ly ky)) thuc cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tai ((((cac chu) OR (cac che))) OR (cac thu)) đe co bang ((ly y) OR (ly ky)) thuc cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tai ((((cac chu) OR (cac che))) or (cac thu)) đe co bang ((ly y) or (ly ky)) thuc cong cong".
• Adding a wildcard symbol may retrieve word variants: quyen tai ((((cac chu) OR (cac che))) or (cac thu)) đe co bang ((ly y) or (ly ky)) thuc cong cong*.