Perhaps you should try some spelling variations:
thien van » thi van
cau triet » cau trieu, su triet, cua triet
danh hai » dang hai, lanh hai, manh hai
su sach » so sach, vu sach
so sanh » do sanh
van cau » van dau, van hau, van chat
cau tuc » cau truc, cau tu, cau luc
xa danh » va danh, dia danh, nam danh
hai cau » hai chau, hai chu, hai hau
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 sanh)) y nang x hoi. thien van cau tuc xa danh hai cau triet~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y nang x hoi. thien van cau tuc xa danh hai cau triet*.