Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
truc va » thuc va, thuc vat, trung va
hanh ca » hanh cac, hanh cat, hanh cua
xuc va » duc va, tuc va, luc va
ca cua » co 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: su sach ((ty nang) OR (ky nang)) xa hoi. hieu van nam ((xuc va) OR (truc va)) hanh ca cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) xa hoi. hieu van nam ((xuc va) or (truc va)) hanh ca cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ky nang)) xa hoi. hieu van nam ((xuc va) or (truc va)) hanh ca cua te*.