Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hieu ve » hieu va, hieu van

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 y ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu qua)) cam duc va hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu qua)) cam duc va hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu qua)) cam duc va hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu qua)) cam duc va hanh vai cua triet*.