Perhaps you should try some spelling variations:
xuyen tai » xuyen tac, nguyen tai, truyen tai
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
cac khoi » cac thoi, cac khoan, cach thoi
cac thu » cach thuc, cac thoi
ban kem » banh kem, ban ke, hanh kem
kem ky » ke ky, kem ly
ky thu » ly thu, ky thi, ky thuat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: xuyen tai ((cac khoi) or (cac thu)) đe co ban kem ky thu ((cong cong) or (dung cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: xuyen tai ((cac khoi) OR (cac thu)) đe co ban kem ky thu ((cong cong) OR (dung cong)).
• Adding a wildcard symbol may retrieve word variants: xuyen tai ((cac khoi) or (cac thu)) đe co ban kem ky thu ((cong cong) or (dung cong))*.