Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
tu cach » tu cac
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va cam » va cham, va cac, va cao
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 cach) or (nguoi sach)) ky ((nang xa) or (nang ma)) hoi. hieu va cam duc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (nguoi sach)) ky ((nang xa) OR (nang ma)) hoi. hieu va cam duc van hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (nguoi sach)) ky ((nang xa) or (nang ma)) hoi. hieu va cam duc van hanh vi cua triet*.