Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
truc ban » thuc ban, truc dan, truc van
hieu van » hieu va, thien van, lieu va
dau truc » cau truc, dai truc, doan truc
hanh ve » hanh vi, hanh va, hanh kem
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
van dau » van dao, phan dau
nang xa » nang x, lang xa, nang ma
cua te » cua tu
anh ve » anh va, anh viet, thanh 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 dau truc ban ((anh ve) or (hanh ve)) ((cua te) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van dau truc ban ((anh ve) OR (hanh ve)) ((cua te) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van dau truc ban ((anh ve) or (hanh ve)) ((cua te) or (cau treo))*.