Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
hanh va » hang va, hanh vi
so sach » so sanh, bo sach, co sach
cac loc » cac lop, cac toc, cac hoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
hanh vu » hanh vi, hanh tu, hanh ve
loc va » hoc va, luc va
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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 ve cac loc va ((hanh vu) or (hanh va)) ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. hieu ve cac loc va ((hanh vu) OR (hanh va)) ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu ve cac loc va ((hanh vu) or (hanh va)) ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu ve cac loc va ((hanh vu) or (hanh va)) ((va triet) OR (va trien))*.