Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
cau thuc » cau truc, cuu thuc, can thuc
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cau » ke cau, va cau, ve cac

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: tu sach thu ((nang xa) OR (nang x)) hoi. hieu ve cau thuc va hanh vi ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((nang xa) or (nang x)) hoi. hieu ve cau thuc va hanh vi ((cua triet) OR (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((nang xa) or (nang x)) hoi. hieu ve cau thuc va hanh vi ((cua triet) OR (cua viet))*.