Perhaps you should try some spelling variations:
thien van » thi van
thuoc ban » thuoc tan, thuoc dang, thu ban
cua triet » cua viet, su triet, va triet
thuc dan » thuc hanh, hoc dan, thuc vat
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
vi cua » vai cua, di 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: su sach ky nang x hoi. thien van nam ((thuc dan) OR (thuoc ban)) thanh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. thien van nam ((thuc dan) or (thuoc ban)) thanh vi cua triet*.