Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
qua dao » lua dao, qua da, cua dao
tuc van » thuc van, truc van, duc van
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa
vi cuu » vi luu, vinh cuu
x hoi » o hoi, x ho, 5 hoi

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: tu sach v nang ((x hoi) OR (xa hoi)). hieu qua dao ((tuc van) OR (tuc va)) hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang ((x hoi) or (xa hoi)). hieu qua dao ((tuc van) OR (tuc va)) hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang ((x hoi) or (xa hoi)). hieu qua dao ((tuc van) OR (tuc va)) hanh vi cuu tre*.