Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach de » cach de, sach dao, sach dat
hanh va » hang va, hanh vi
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
hang xa » hoang xa, hang va, hang ca
de hang » de dang, de tang, de bang
cua tre » cua te, cuu tre, cua triet
loc va » hoc va
luc va » duc va, tuc va
va cua » va chua, via cua, ca 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: thuoc sach de hang xa hoi. hieu ((ve cham) OR (ve chat)) ((loc va) OR (luc va)) hanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach de hang xa hoi. hieu ((ve cham) or (ve chat)) ((loc va) OR (luc va)) hanh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach de hang xa hoi. hieu ((ve cham) or (ve chat)) ((loc va) OR (luc va)) hanh va cua tre*.