Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuoc » nam thuc, nam thu, nha thuoc
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thuoc va » thuc va, thuoc ma, thuong va
ty nang » ty xang, ty hang, ly nang
va tinh » may tinh
tinh di » tinh doi, trinh di, tinh da
di cua » dai cua, doi cua, de cua
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: thu sach ((ty nang) OR (ky nang)) x hoi. hieu van nam thuoc va tinh di cua triet~.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ky nang)) x hoi. hieu van nam thuoc va tinh di cua triet*.