Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, dia danh
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, ban hanh
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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) OR (hoc sach)) y nang xa hoi. hieu van cam xuc ((va danh) or (va hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) y nang xa hoi. hieu van cam xuc ((va danh) OR (va hanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) y nang xa hoi. hieu van cam xuc ((va danh) or (va hanh)) vai cua tre*".