Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
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
sach ky » sac ky, sach y, sach kem
dang xa » dang xay, lang xa, dang ha
sach ty » sach y, sach tu, sach thu
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 ky) OR (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 ky) OR (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 ky) OR (sach ty)) ((dang xa) or (van xay)) hoi. hieu van pham cuc ban hanh vai cua tre*".