Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) OR (ly nang)) ma hoi. hieu va cam xuc va dan vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) OR (ly nang)) ma hoi. hieu va cam xuc va dan vi cua tre*.