Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh cua » manh cua, hang cua, hanh sua
van hanh » van thanh, ban hanh, van anh
cam luc » cau luc
cua cua » cua chua, ca cua, qua cua
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam luc) or (cam xuc)) van hanh cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam luc) OR (cam xuc)) van hanh cua cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam luc) or (cam xuc)) van hanh cua cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam luc) or (cam xuc)) van hanh cua cua triet*.