Executed SQL (First Query):

SELECT p.product_id,
            (SELECT price FROM ti9jo39em_product_special ps WHERE ps.product_id = p.product_id AND ps.customer_group_id = '1' AND ((ps.date_start = '0000-00-00' OR ps.date_start < NOW()) AND (ps.date_end = '0000-00-00' OR ps.date_end > NOW())) ORDER BY ps.priority ASC, ps.price ASC LIMIT 1) AS special,
            (SELECT price FROM ti9jo39em_product_discount pd2 WHERE pd2.product_id = p.product_id AND pd2.customer_group_id = '1' AND pd2.quantity = '1' AND ((pd2.date_start = '0000-00-00' OR pd2.date_start < NOW()) AND (pd2.date_end = '0000-00-00' OR pd2.date_end > NOW())) ORDER BY pd2.priority ASC, pd2.price ASC LIMIT 1) AS discount,
            (MATCH(pd.name, pd.description) AGAINST('+xiaomi +redmi +note +5 +pro' IN BOOLEAN MODE) + MATCH(p.model) AGAINST('+xiaomi +redmi +note +5 +pro' IN BOOLEAN MODE)) AS relevance
            FROM ti9jo39em_product p 
            LEFT JOIN ti9jo39em_product_description pd ON (p.product_id = pd.product_id) 
            LEFT JOIN ti9jo39em_product_to_store p2s ON (p.product_id = p2s.product_id) 
            WHERE pd.language_id IN (1,2) 
                AND p.status = '1' 
                AND p.date_available <= NOW() 
                AND p2s.store_id = '0'
                AND p.quantity > 0
                AND (MATCH(pd.name, pd.description) AGAINST('+xiaomi +redmi +note +5 +pro' IN BOOLEAN MODE) OR MATCH(p.model) AGAINST('+xiaomi +redmi +note +5 +pro' IN BOOLEAN MODE))
            GROUP BY p.product_id ORDER BY (CASE WHEN special IS NOT NULL THEN special WHEN discount IS NOT NULL THEN discount ELSE p.price END) ASC, LCASE(pd.name) ASC LIMIT 0,20

Number of Rows Returned:

Raw Results:

array(0) {
}