Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
van cau » van dau, van hau, van chat
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
y nang » ly nang, v nang, may nang
ma hoi » xa hoi, ma hoa, me hoi
cau tu » dau tu, cau truc
di cua » dai cua, doi cua, de cua

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 ((y nang) OR (ky nang)) ((ma hoi) OR (mai hoi)). thien van cau tu va hanh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) ((ma hoi) or (mai hoi)). thien van cau tu va hanh di cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) ((ma hoi) or (mai hoi)). thien van cau tu va hanh di cua triet*.