Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
cua triet » su triet, va triet
trung va » truong va, trang va, trung ha
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
y nang » ly nang, v nang, may nang
va cau » van cau, va cac, va dau

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)) xa hoi. lieu va cau trung va hanh tai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) xa hoi. lieu va cau trung va hanh tai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) xa hoi. lieu va cau trung va hanh tai ((cua triet) or (cua viet))*.