Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
nang xa » nang x, lang xa, nang ma
cau luc » cau truc, cau phuc
hau loc » huu loc, phau hoc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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 hoi. hieu van ((cau luc) or (hau loc)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. hieu van ((cau luc) OR (hau loc)) va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. hieu van ((cau luc) or (hau loc)) va hanh dai cua tre*.