Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dan thuc » dan toc, am thuc
vat hanh » vat thanh, van hanh, va hanh
tu cach » tu cac
hoc cac » hoc cao
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van dan » van ban, ban dan, van dao
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 cach) OR (hoc cac)) ky lang xa hoi. hieu van dan thuc vat hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (hoc cac)) ky lang xa hoi. hieu van dan thuc vat hanh vi cua tre*.