Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, xa khanh, va hanh
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao

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)) ((tu nang) or (tu nano)) xa hoi. hieu va cao tuc xa hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ((tu nang) OR (tu nano)) xa hoi. hieu va cao tuc xa hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ((tu nang) or (tu nano)) xa hoi. hieu va cao tuc xa hanh vai cua tre*.