Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, va tinh, le thanh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
nam tu » nam thu, nam thuc

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