Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dao luan » dan luan, dao xuan, dat luan
ve triet » va trien, su triet
su sach » so sach, vu sach
luan va » luan van, luat va
va hanh » van hanh, va thanh, ban hanh
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
vi ve » va ve, gi ve, ve ve

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 o hoi. hieu van dao luan va hanh vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang o hoi. hieu van dao luan va hanh vi ve triet*.