Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
hoc vat » hoc va, hoc viet
vu kham » vu khanh
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
ang xa » lang xa, mang xa, dang xay
ty ang » ty xang, ty hang, ty anh

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 ty ang xa hoi. hieu ((va cham) or (vu kham)) ((hoc vat) OR (thuc vat)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ang xa hoi. hieu ((va cham) OR (vu kham)) ((hoc vat) OR (thuc vat)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ang xa hoi. hieu ((va cham) or (vu kham)) ((hoc vat) OR (thuc vat)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ang xa hoi. hieu ((va cham) or (vu kham)) ((hoc vat) OR (thuc vat)) hanh vai cua tre*.