Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
thuc cong » thuoc cong, chuc cong, thuc con
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
ly y » ly ky
dong » dung

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 y ((thuc cong) OR (thu cong)) dong~.
• 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 y ((thuc cong) OR (thu cong)) dong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tai ((((cac chu) or (cac thu))) or (cac khu)) đe co ban ly y ((thuc cong) OR (thu cong)) dong".
• Adding a wildcard symbol may retrieve word variants: quyen tai ((((cac chu) or (cac thu))) or (cac khu)) đe co ban ly y ((thuc cong) OR (thu cong)) dong*.