Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, xuc ban
san ky » sang ky, van ky, ban ky
dan ky » van ky
va cam » va cham, va cac, va cao

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

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