Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va cham » va chat, va tham
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
xuc va » duc va, tuc va, xac va
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: thu sach y nang x hoi. hieu va cham ((xuc va) or (luc va)) hanh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu va cham ((xuc va) OR (luc va)) hanh vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu va cham ((xuc va) or (luc va)) hanh vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu va cham ((xuc va) or (luc va)) hanh vai ((cua tre) OR (cuu tre))*.