Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
dinh dai » dinh dat, sinh dai, dinh dao
ngan luc » nhan luc, nguon luc, nganh suc
va dinh » van dinh, va kinh, va tinh
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
sach v » sach va, sach y, sach 2
luc va » duc va, tuc va, loc va
nang o » nang co, nang ho, nang ro
v nang » va nang, vu nang, van nang
dai va » mai va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v nang o hoi. ((hieu vu) or (hieu van)) ngan luc va dinh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang o hoi. ((hieu vu) OR (hieu van)) ngan luc va dinh dai va triet.
• Adding a wildcard symbol may retrieve word variants: te sach v nang o hoi. ((hieu vu) or (hieu van)) ngan luc va dinh dai va triet*.