Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
vien cac » vien bach, vien dai, vien da
hanh va » hang va, hanh vi
hanh vu » hanh vi, hanh tu, hanh ve
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ve cac » va cac

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

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