Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
truc ban » thuc ban, truc dan, truc van
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
anh vi » anh va, anh ve, anh vu
cua te » cua tu

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 truc ban ((anh vi) or (hanh vi)) ((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 cau truc ban ((anh vi) OR (hanh vi)) ((cua te) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van cau truc ban ((anh vi) or (hanh vi)) ((cua te) or (cau treo))*.