Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
cau thuc » cau truc, cuu thuc, can thuc
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
tu sach » su sach, te sach, tu cach
nang xa » lang xa, nang ma, mang xa
ve cau » ke cau, va cau, ve cac
vi cua » vai cua, di 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: ((tu sach) OR (thu sach)) thu ((nang xa) OR (nang x)) hoi. hieu ve cau thuc va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) thu ((nang xa) or (nang x)) hoi. hieu ve cau thuc va hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) thu ((nang xa) or (nang x)) hoi. hieu ve cau thuc va hanh vi cua triet*.