Perhaps you should try some spelling variations:
cam trung » cam truong, cac trung, cao trung
nam trung » nam trong, tai trung, ba trung
cua triet » cua viet, su triet, va triet
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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 ma hoi. hieu qua ((cam trung) or (nam trung)) va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ma hoi. hieu qua ((cam trung) OR (nam trung)) va hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. hieu qua ((cam trung) or (nam trung)) va hanh di cua triet*.