Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
sach ky » sach ty, sach kem, sach hay
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
su tien » su kien, su hien, tu tieng
sac ky » cac ky, sai ky

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

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