Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nang xa » lang xa, nang ma, mang xa
van cam » van nam, van lam, van cau
hanh va » hang va
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((nang xa) or (nang x)) hoi. hieu van cam xuc va ((hanh vi) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc va ((hanh vi) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang xa) or (nang x)) hoi. hieu van cam xuc va ((hanh vi) or (hanh va)) cua tre*.