Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
tuyen tai » truyen tai, tuyen tap, xuyen tai
dung cong » dung trong
cac kieu » cach tieu, cac yeu, tac kiem
xay tien » may tien, day tieng, tay tieng
cac thu » cach thuc, cac thoi
ban ve » ban va

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

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