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

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