Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thien van » thi van
danh hai » dang hai, lanh hai, manh hai
van cau » van dau, van hau, van chat
so sanh » do sanh
cau tuc » cau truc, cau tu, cau luc
va danh » va dinh, va dan, va hanh
hai cau » hai chau, hai chu, hai hau
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, 5 hoi

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) OR (x ho)). thien van cau tuc va danh hai cau triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) y nang ((x hoi) OR (x ho)). thien van cau tuc va danh hai cau triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y nang ((x hoi) OR (x ho)). thien van cau tuc va danh hai cau triet*.