Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
va dinh » van dinh, va kinh, va tinh
ky van » ly van, ty van, ky va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky van xay hoi. hieu va cac duc ((va hanh) or (va dinh)) di ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky van xay hoi. hieu va cac duc ((va hanh) OR (va dinh)) di ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky van xay hoi. hieu va cac duc ((va hanh) or (va dinh)) di ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: so sanh ky van xay hoi. hieu va cac duc ((va hanh) or (va dinh)) di ((cua triet) OR (va triet))*.