Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
ban hanh » ban hang
hieu ve » hieu va, hieu van
dac ban » cac ban, dac san, duc ban
cac dac » cac dan, cac dai, cac bac
tu sach » thu sach, te sach, tu cach
ty sang » ty xang, ty hang, duy sang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty sang ((ma hoa) OR (xa hoi)). hieu ve cac dac ban hanh thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty sang ((ma hoa) or (xa hoi)). hieu ve cac dac ban hanh thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty sang ((ma hoa) or (xa hoi)). hieu ve cac dac ban hanh thai cua tre*.