Perhaps you should try some spelling variations:
thuoc dung » hoc dung, thuy dung
tuyen tai » truyen tai, tuyen tap, xuyen tai
xuyen tac » xuyen tai, nguyen tac, thuyen tac
thu dung » thuy dung, thuc dung, thu dang
cuc che » cuu che, cac che, cua che
ban ve » ban va
ve ky » va ky, ke ky

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) or (xuyen tac)) cuc che đe co ban ve ky ((thu dung) or (thuoc dung)) cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tuyen tai) OR (xuyen tac)) cuc che đe co ban ve ky ((thu dung) OR (thuoc dung)) cong.
• Adding a wildcard symbol may retrieve word variants: ((tuyen tai) or (xuyen tac)) cuc che đe co ban ve ky ((thu dung) or (thuoc dung)) cong*.