Perhaps you should try some spelling variations:
tuyen tai » truyen tai, tuyen tap, xuyen tai
dung cong » dung trong
cac khoi » cac thoi, cac khoan, cach thoi
cac kieu » cach tieu, cac yeu, tac kiem
thu dung » thuy dung, thuc dung, thu dang
cac thu » cach thuc, cac thoi
ve y » ve ky, ke y, te y

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 thu) or (((cac khoi) or (cac kieu)))) đe co ban ((ve y) or (ve _)) thu dung cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tai ((cac thu) OR (((cac khoi) OR (cac kieu)))) đe co ban ((ve y) OR (ve _)) thu dung cong.
• Adding a wildcard symbol may retrieve word variants: tuyen tai ((cac thu) or (((cac khoi) or (cac kieu)))) đe co ban ((ve y) or (ve _)) thu dung cong*.