Perhaps you should try some spelling variations:
phuc ban » phuc van, thuc ban, thuoc ban
hieu van » hieu va, thien van, lieu va
cau phuc » cau truc, chau phu, huu phuc
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
cua te » cua tu
anh vi » hanh vi, anh va, anh ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu van cau phuc ban ((anh vi) or (hanh va)) ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van cau phuc ban ((anh vi) OR (hanh va)) ((cua te) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van cau phuc ban ((anh vi) or (hanh va)) ((cua te) or (cuu tre))*.