Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, luan phan
va trien » va truyen, va thiet, va tuyen
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuc ban » cac ban, cuu ban, duc ban

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 phan ((cuc ban) or (cua ban)) hanh vi ((va trien) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van phan ((cuc ban) OR (cua ban)) hanh vi ((va trien) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van phan ((cuc ban) or (cua ban)) hanh vi ((va trien) or (su triet))*.