Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
hanh vu » hanh tu, hanh ve, hanh xu
hanh va » hang va
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
loc va » hoc va, luc 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 loc va ((hanh vu) or (((hanh va) OR (hanh vi)))) va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve cac loc va ((hanh vu) OR (((hanh va) OR (hanh vi)))) va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ve cac loc va ((hanh vu) or (((hanh va) OR (hanh vi)))) va trien".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve cac loc va ((hanh vu) or (((hanh va) OR (hanh vi)))) va trien*.