Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
va cao » va cac, va co, va dao
y nang » ky nang, ly nang, v nang
loc va » hoc va
luc va » duc va, tuc va

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

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