SQL Syntax help for passing multi-value parameter to a substring up until the first space

I have a table of data with a column named style. the data in that column is formatted in a way that it includes style, label and size.
Style
1177044 33C XL
2177003 33C 06J04
3173327E 33C 0610
Etc....

I have an SSRS report that I want to allow the end user to be able to search by multiple styles by manually entering them into the Parameter field.

I have created the following query which works perfectly if I only enter one style. However If I search by multiple it returns nothing. I'm using this piece of code ( LEFT(style, CHARINDEX(' ', style) - 1) ) to grab just the style number up to the first space.

SELECT  style ,
        style_name ,
        group_code ,
        color_name ,
        color_code ,
        size_name ,
        size_code ,
        UPC ,
        pack_breakdown ,
        GTIN ,
        length ,
        width ,
        height ,
        weight ,
        cube ,
        pcs_per_ctn ,
        pcs_per_innr ,
        innr_per_ctn ,
        pcs_per_poly ,
        poly_per_ctn ,
        pack ,
        UOM ,
        dimension ,
        lbl_code ,
        CASE WHEN ( group_code = 'KLL' ) THEN ( '49880-00' )
             ELSE ( '84260-05' )
        END AS NMFC ,
        CASE WHEN ( group_code = 'KLL' ) THEN ( '100' )
             ELSE ( '125' )
        END AS Class ,
        date_added AS Date
FROM    KLL_Cust.dbo.Phoenix832
WHERE   ( group_code = @Division )
        AND ( ( @Style ) IN ( LEFT(style, CHARINDEX(' ', style) - 1) ) )
ORDER BY group_code;

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What do I need to do in order to pull back multiple styles?