Perhaps you should try some spelling variations:
cau thuoc » cay thuoc, cao thuoc, cuu thuoc
ban thanh » ban hanh, ban hang
thuoc ban » thuoc tan, thuoc dang, thu ban
thu sach » tu sach, thuat sach, thuoc sach
viet cau » viet chau, viet ca, viet chu
hieu ve » hieu va, hieu van
lang ha » long ha
lang xa » dang xay, lang van
vi cau » va cau, di cau
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((lang xa) or (lang ha)) hoi. hieu ve cau thuoc ban thanh ((vi cau) or (viet cau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (lang ha)) hoi. hieu ve cau thuoc ban thanh ((vi cau) OR (viet cau)) treo.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) or (lang ha)) hoi. hieu ve cau thuoc ban thanh ((vi cau) or (viet cau)) treo*.