Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hanh vai » hanh vi, hanh va, hanh tai
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tru nang xa hoi. hieu ve cam ((luc va) or (tuc xa)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tru nang xa hoi. hieu ve cam ((luc va) OR (tuc xa)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach tru nang xa hoi. hieu ve cam ((luc va) or (tuc xa)) hanh vai cua tre*.