Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
do sang » do dang, do tang, do bang
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
lang xa » dang xay, lang van

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: ((do sang) OR (do sanh)) ky ((lang xa) OR (lang ha)) hoi. hieu van cac duc va hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do sang) OR (do sanh)) ky ((lang xa) or (lang ha)) hoi. hieu van cac duc va hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((do sang) OR (do sanh)) ky ((lang xa) or (lang ha)) hoi. hieu van cac duc va hanh vai cua tre*.