Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
hanh vu » hanh vi, hanh tu, hanh ve
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ve cac luc va ((hanh vu) or (hanh va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ve cac luc va ((hanh vu) OR (hanh va)) va triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ve cac luc va ((hanh vu) or (hanh va)) va triet*.