Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
cach tieu » sach thieu, cach bien, cach tu
cong cong » cong dong, trong cong, dung cong
cac kieu » cac yeu, tac kiem, cac khu
co hang » cho hang, co chang, co hoang
hang ly » huong ly
ky thu » ly thu, ky thi, ky thuat
y thu » ly thu, y thuc, _ thu

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