Perhaps you should try some spelling variations:
quyen tai » nguyen tai, truyen tai, luyen thi
xuyen tai » xuyen tac, nguyen tai, truyen tai
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
cac khu » cac thu, cac khoi, cac kieu
ban ly » ban lay, bang ly, ban le
ly ly » ly ky, ly y

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

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