Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
truc va » thuc va, trung va
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu van chat ((truc va) OR (thuc vat)) danh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van chat ((truc va) OR (thuc vat)) danh dai cua tre*.