var query = from c in this.PrihNakls
                        select c;

 query = from c in query
                        where c.PrihNaklDtls
                        .Count(dt => dt.PartiaLinks.Single().Partia.Artic.va_articul
                            .Contains(filters.va_articul.value)) >  0 
                        select c;

exec sp_executesql N'SELECT [t0].[pn_id], [t0].[pn_date], [t0].[pn_sclad], [t0].[pn_num], [t0].[pn_mo_id], [t0].[pn_pto_id], [t0].[pn_valutcode], 
[t0].[pn_author], [t0].[pn_inum], [t0].[pn_who_create], [t0].[pn_when_create], [t0].[pn_who_corr], [t0].[pn_when_corr], [t0].[pn_grp_mo_id], 
[t0].[pn_gro_pto_id], [t0].[pn_operation]
FROM [dbo].[PrihNakl] AS [t0]
WHERE ((
    SELECT COUNT(*)
    FROM (
        SELECT 
            (CASE 
                WHEN ((
                    SELECT [t7].[va_articul]
                    FROM [dbo].[PartiaLink] AS [t5]
                    INNER JOIN [dbo].[Partia] AS [t6] ON [t6].[par_id] = [t5].[parl_par_id]
                    INNER JOIN [dbo].[VariArtc] AS [t7] ON [t7].[va_id] = [t6].[par_va_id]
                    WHERE [t5].[parl_pnd_id] = [t1].[pnd_id]
                    )) LIKE @p0 THEN 1
                WHEN NOT (((
                    SELECT [t7].[va_articul]
                    FROM [dbo].[PartiaLink] AS [t5]
                    INNER JOIN [dbo].[Partia] AS [t6] ON [t6].[par_id] = [t5].[parl_par_id]
                    INNER JOIN [dbo].[VariArtc] AS [t7] ON [t7].[va_id] = [t6].[par_va_id]
                    WHERE [t5].[parl_pnd_id] = [t1].[pnd_id]
                    )) LIKE @p0) THEN 0
                ELSE NULL
             END) AS [value], [t1].[pnd_pn_id]
        FROM [dbo].[PrihNaklDtl] AS [t1]
        ) AS [t8]
    WHERE ([t8].[value] = 1) AND ([t8].[pnd_pn_id] = [t0].[pn_id])
    )) > @p1
ORDER BY [t0].[pn_date]',N'@p0 nvarchar(4),@p1 int',@p0=N'%ар%',@p1= 0 

exec sp_executesql N'SELECT 
....
FROM [dbo].[PrihNakl] AS [t0]
WHERE EXISTS(
    SELECT NULL AS [EMPTY]
    FROM [dbo].[PrihNaklDtl] AS [t1]
    WHERE (((
        SELECT [t4].[va_articul]
        FROM [dbo].[PartiaLink] AS [t2]
        INNER JOIN [dbo].[Partia] AS [t3] ON [t3].[par_id] = [t2].[parl_par_id]
        INNER JOIN [dbo].[VariArtc] AS [t4] ON [t4].[va_id] = [t3].[par_va_id]
        WHERE [t2].[parl_pnd_id] = [t1].[pnd_id]
        )) LIKE @p0) AND ([t1].[pnd_pn_id] = [t0].[pn_id])
    )
ORDER BY [t0].[pn_date]',N'@p0 nvarchar(4)',@p0=N'%бу%'