Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
ty nang » ty xang, ty hang, ly nang
truc va » thuc va, thuc vat, trung va
hanh va » hang va, hanh vi
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua
cua te » cua tu

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: vu sach ((ty nang) OR (ky nang)) xa hoi. hieu van nam ((xuc va) OR (truc va)) hanh va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty nang) OR (ky nang)) xa hoi. hieu van nam ((xuc va) or (truc va)) hanh va cua te~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty nang) OR (ky nang)) xa hoi. hieu van nam ((xuc va) or (truc va)) hanh va cua te*.