Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat tai » chat thai, cao tai, khau tai
thanh vi » hanh vi, thanh va, thanh ve
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
tai ban » tai san, tai ngan, tai benh
y nang » ky nang, ly nang, v nang

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