Perhaps you should try some spelling variations:
sach cao » sach dao, sach cap, mach cao
cao bang » cao dang, cao tang, cao nang
bang bac » bang cac, hang ban, dong bac
so sach » so sanh, bo sach, co sach
bac hoi » bac ho, bac hoc, sach hoi
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
hanh va » hang va
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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 cao bang bac hoi. hieu ve cam xuc van ((hanh va) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach cao bang bac hoi. hieu ve cam xuc van ((hanh va) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach cao bang bac hoi. hieu ve cam xuc van ((hanh va) or (hanh vi)) cua tre*.