Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
thai dung » thai duong, thai vung, thai dong
thi dung » thi huong, thi nhung, thi cong
cac chu » cac thu, cac che, ca chu
cac khu » cac thu, cac khoi, cac kieu
ban le » ban ve
le ky » ke ky, ve ky, ly ky

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