@abc.abstractmethod<EOL><INDENT>def get_values_by_search(self, value_query, value_search):<DEDENT>
return<EOL>
Gets a list of ``Values`` matching the given search query using the given search.

        :param value_query: the value query
        :type value_query: ``osid.configuration.ValueQuery``
        :param value_search: the value search
        :type value_search: ``osid.configuration.ValueSearch``
        :return: the serach results
        :rtype: ``osid.configuration.ValueSearchResults``
        :raise: ``NullArgument`` -- ``value_query`` or ``value_search`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``value_query`` or ``value_search`` is not of this service

        *compliance: mandatory -- This method must be implemented.*