Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
toc sach » hoc sach, doc sach, thuoc sach
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
xuc va » tuc va, luc va, xac va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. hieu ((va cam) or (va cao)) ((xuc va) OR (duc va)) thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu ((va cam) OR (va cao)) ((xuc va) OR (duc va)) thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoi. hieu ((va cam) or (va cao)) ((xuc va) OR (duc va)) thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. hieu ((va cam) or (va cao)) ((xuc va) OR (duc va)) thanh hai cua tre*.