Perhaps you should try some spelling variations:
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
tao hoi » tao khoi, tao boi, tay hoi
van cam » van nam, van lam, van cau
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
ban voi » ban moi, ba voi, ban noi
cua tre » cua te, cuu tre, cua triet
y sang » _ sang, duy sang
ban ve » ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y sang tao hoi. hieu van cam cuc ban ((hanh vi) or (((ban voi) or (ban ve)))) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y sang tao hoi. hieu van cam cuc ban ((hanh vi) OR (((ban voi) OR (ban ve)))) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y sang tao hoi. hieu van cam cuc ban ((hanh vi) or (((ban voi) or (ban ve)))) cua tre*.