Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
can thuc » dan thuc, van thuc, cay thuc
cac thuc » cach thuc, cac thu, cay thuc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, tu cach
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky lang ha noi. hieu ve ((cac thuc) or (can thuc)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang ha noi. hieu ve ((cac thuc) OR (can thuc)) va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang ha noi. hieu ve ((cac thuc) or (can thuc)) va hanh vi cua triet*.