Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cao » va cac, va co, va dao
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach v nang x hoi. lieu va cao ((xuc va) OR (tuc va)) hanh vi ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang x hoi. lieu va cao ((xuc va) OR (tuc va)) hanh vi ((cua tre) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach v nang x hoi. lieu va cao ((xuc va) OR (tuc va)) hanh vi ((cua tre) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang x hoi. lieu va cao ((xuc va) OR (tuc va)) hanh vi ((cua tre) or (cua tu))*.