Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dau tren » dau tien, dat tren, dau tieng
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
hanh va » hang va, hanh vi
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang
soc va » loc va, doc va, goc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. lieu va cham ((soc va) OR (hoc va)) hanh va ((cu tren) OR (dau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. lieu va cham ((soc va) OR (hoc va)) hanh va ((cu tren) or (dau tren))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. lieu va cham ((soc va) OR (hoc va)) hanh va ((cu tren) or (dau tren))*.