Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
pham cuc » pham chuc, pham duc, pham cua
van pham » san pham, van phan, van phat
vai cua » dai cua, hai cua, lai cua
cuc ban » cua ban, cac ban, cuu ban
tu sach » su sach, te sach, tu cach
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet

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) OR (thu sach)) ty ((dang xa) or (van xay)) hoi. hieu van pham cuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty ((dang xa) OR (van xay)) hoi. hieu van pham cuc ban hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty ((dang xa) or (van xay)) hoi. hieu van pham cuc ban hanh vai cua tre*".