Filtering CPT and CT in a custom loop

Hi all,
I don’t seem to be able to filter a query for CPT with custom taxonomy; I have a CPT called ‘publication’ and a CT called ‘publication-types’; under ‘publication-types’ I created some categories and one of those is called ‘reports’.
I’m trying to filter in a custom loop 2 posts out of ‘reports’ only: http://www.firstcall.workingdesign.ca/publication-types/reports/ and in the future I will try to have 2 loops filtering also another category called ‘letters’, but for the sake of the question let’s consider only ‘reports’.

Here is the code I’m trying to put in my page template:

<!-- custom loop 1 -->
                        <?php
                            add_filter('tc_show_post_metas', '__return_true');
                            global $wp_query, $wp_the_query;

                            $term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );

                            $wp_query = new WP_Query( array(
                                'paged'             => get_query_var('paged') ? get_query_var('paged') : 1,
                                'post_type'         => 'publication',
                                'publication-types' => $term->taxonomy,
                                'reports'           => $term->slug,
                                'post_status'       => 'publish',
                                'posts_per_page'    => 2,   //show n posts
                                //'cat'               => 77, //include this category from the posts list
                                //'tag_id'            => '77',
                                //'tag'               => 'reports',
                                //'page_name'         => 'publication-s',
                                //'taxonomy'          => 'publication-types',
                                //'category_name'     => 'reports',
                                //'page_name'         => 'publication-types/reports',
                                //others parameters here: http://codex.wordpress.org/Class_Reference/WP_Query#Parameters
                            ) );
                        ?>

<!-- Customizr Loop here -->

<!-- reset the main query -->
<?php $wp_query = $wp_the_query; ?>

well, it does not work because I’m missing the point, it outputs only the 2 most recent posts under ‘publication’, what am I missing && || doing wrong?
https://github.com/giorgioriccardi/filtering-cpt-and-ct-in-WP-customizr-theme/blob/master/publications-page.php#L58

Thanks for any tip you can give here 😉