Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
dac van » cac van, dao van, dam van
cac dac » cac dan, cac dai, cac bac
tu sach » thu sach, su sach, te sach
ty sang » ty hang, duy sang, thu sang
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty sang) OR (ty xang)) ((ma hoa) or (xa hoi)). hieu ve cac dac van hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty sang) OR (ty xang)) ((ma hoa) OR (xa hoi)). hieu ve cac dac van hanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty sang) OR (ty xang)) ((ma hoa) or (xa hoi)). hieu ve cac dac van hanh thai cua tre*".