Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac loc » cac lop, cac toc, cac hoc
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, mang xa, ang xa
san ky » sang ky, van ky, dan ky
loc va » hoc va, luc va
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((((nang xa) or (nang ma))) or (lang xa)) hoi. hieu van cac loc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((((nang xa) OR (nang ma))) OR (lang xa)) hoi. hieu van cac loc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((((nang xa) or (nang ma))) or (lang xa)) hoi. hieu van cac loc va hanh vai cua tre*.