Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
tran thuy » thanh thuy, tran thi, tran huu
thuc dung » thuoc dung, thuy dung, tuc dung
thuat ung » thuat dung, thuat hung, thuat xung
tran thu » tran thi, tuan thu, tran tu
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: quyen tap ((tran thu) OR (tran thuy)) đe co ban ve ky ((thuc dung) or (thuat ung)) cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((tran thu) OR (tran thuy)) đe co ban ve ky ((thuc dung) OR (thuat ung)) cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tap ((tran thu) OR (tran thuy)) đe co ban ve ky ((thuc dung) or (thuat ung)) cong".
• Adding a wildcard symbol may retrieve word variants: quyen tap ((tran thu) OR (tran thuy)) đe co ban ve ky ((thuc dung) or (thuat ung)) cong*.