Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
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: ((so sach) or (vu sach)) ky nang xa hoi. hieu qua cac duc ((van hanh) or (van minh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu sach)) ky nang xa hoi. hieu qua cac duc ((van hanh) OR (van minh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu sach)) ky nang xa hoi. hieu qua cac duc ((van hanh) or (van minh)) vi cua triet*.