Perhaps you should try some spelling variations:
ban thuoc » dang thuoc, cay thuoc, nam thuoc
hieu viec » nhieu viec, hieu ve, sieu viet
ban nuoc » ban duoc, ban nuoi, luan nuoc
so sach » so sanh, bo sach, co sach
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tu cua » vu cua
hu cua » vu cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. hieu viec ((ban nuoc) OR (ban thuoc)) va danh ((tu cua) OR (hu cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky lang xa hoi. hieu viec ((ban nuoc) or (ban thuoc)) va danh ((tu cua) OR (hu cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. hieu viec ((ban nuoc) or (ban thuoc)) va danh ((tu cua) OR (hu cua)) tre*.