Perhaps you should try some spelling variations:
sach hoi » sach doi, sach moi, cach thoi
dang xay » dang van, van xay
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
vi cua » vai cua, di 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: te sach hoi ((lang xa) OR (dang xay)) hoi. hieu ((ve cham) OR (vu cham)) luc va danh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi ((lang xa) or (dang xay)) hoi. hieu ((ve cham) OR (vu cham)) luc va danh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach hoi ((lang xa) or (dang xay)) hoi. hieu ((ve cham) OR (vu cham)) luc va danh vi cua tre*.