Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
y nang » ky nang, ly nang, v nang
va cua » va chua, via cua, ca cua
va cam » va cham, va cao, va cai
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) OR (thuoc sach)) y nang x hoi. hieu ((va cam) or (va cac)) xuc va thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) y nang x hoi. hieu ((va cam) OR (va cac)) xuc va thanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) y nang x hoi. hieu ((va cam) or (va cac)) xuc va thanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) y nang x hoi. hieu ((va cam) or (va cac)) xuc va thanh va cua tre*.