Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
danh vai » danh sai, danh va, doanh van
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, dua tren
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
su sach » vu sach
van cac » van hac, van cau, van bac
so sach » so sanh, bo sach, co sach
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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) OR (so sach)) y nang x hoi. hieu van cac thuc va danh vai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang x hoi. hieu van cac thuc va danh vai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang x hoi. hieu van cac thuc va danh vai ((cua tre) OR (cua triet))*.