Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
hanh vai » hanh vi, hanh tai, hanh van
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
xuc va » tuc va, luc va, xac va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu van cham ((xuc va) or (duc va)) ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang x hoi. hieu van cham ((xuc va) OR (duc va)) ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x hoi. hieu van cham ((xuc va) or (duc va)) ((hanh vai) or (hanh va)) cua tre*.