Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
nang doc » nang luc
chau tre » chay tren, chau tho, cho tre
ty nang » ky nang, ty xang, ty hang
doc hoi » duoc hoi, hoc hoi, doc hai
cac xuc » cam xuc, cac nuoc, chat xuc
va dinh » van dinh, va kinh, va tinh
xuc va » duc va, tuc va, luc va
dinh a » dinh ba, dinh va, dinh ha
a chau » ha chau, lai chau, hat chau

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)) ty nang doc hoi. lieu va cac xuc va dinh a chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty nang doc hoi. lieu va cac xuc va dinh a chau tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ty nang doc hoi. lieu va cac xuc va dinh a chau tre*.