Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tuc ban » thuc ban, truc ban, tu ban
hac tuc » thac toc, thai tuc
van hac » van hoc, van ha, van hai
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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: su sac ky ((nang xa) OR (nang ma)) hoi. hieu van hac tuc ban ((hang tai) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang xa) OR (nang ma)) hoi. hieu van hac tuc ban ((hang tai) or (hanh vi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang xa) OR (nang ma)) hoi. hieu van hac tuc ban ((hang tai) or (hanh vi)) cua tre*.