Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
luc van » luoc van, luu van, duc van
dua ban » dia ban, cua ban, qua ban
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu van thanh ((luc van) or (dua ban)) hanh vi ((va triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van thanh ((luc van) OR (dua ban)) hanh vi ((va triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van thanh ((luc van) or (dua ban)) hanh vi ((va triet) or (su tien))*.