Perhaps you should try some spelling variations:
ve triet » va trien
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien
hanh tri » thanh tri, hanh tai, hanh trinh
truc va » thuc va, thuc vat, trung va
so sach » so sanh, bo sach, co sach
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
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: so sach y nang xa hoi. hieu van cac ((duc va) or (truc va)) hanh tri ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. hieu van cac ((duc va) OR (truc va)) hanh tri ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu van cac ((duc va) or (truc va)) hanh tri ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu van cac ((duc va) or (truc va)) hanh tri ((su triet) OR (ve triet))*.