Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
thanh dai » thanh hai, thanh tai, thanh oai
thu sach » tu sach, thuat sach, thuoc sach
mai khoa » tai khoa, may khoa, dai khoa
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao

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) OR (v nang)) mai khoa. lieu va cam xuc va ((thanh dai) or (thanh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (v nang)) mai khoa. lieu va cam xuc va ((thanh dai) OR (thanh dat)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (v nang)) mai khoa. lieu va cam xuc va ((thanh dai) or (thanh dat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (v nang)) mai khoa. lieu va cam xuc va ((thanh dai) or (thanh dat)) cua tre*.