Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
ban hanh » ban hang
hieu su » hieu sau, tieu su, hieu so
vai cua » dai cua, hai cua, lai cua
cham so » cham soc, cham o, ham so
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
hieu vu » hieu va, hieu ve, dieu vu
lang xa » lang ha, dang xay, lang van
so ban » sao ban, so bang, co ban

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) or (sach thu)) lang xa hoi. ((hieu vu) or (hieu su)) cham so ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) lang xa hoi. ((hieu vu) OR (hieu su)) cham so ban hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) lang xa hoi. ((hieu vu) or (hieu su)) cham so ban hanh vai cua tre*.