Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dia danh » dia ban, gia dinh
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
cam tuc » cam xuc, nam thuc, dam thuc
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
cam tu » cam thu, nam tu, dam tu
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 tuc) OR (cam tu)) ((dia danh) or (va dinh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu va ((cam tuc) OR (cam tu)) ((dia danh) OR (va dinh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoi. hieu va ((cam tuc) OR (cam tu)) ((dia danh) or (va dinh)) vai cua tre*".