You sure can! Simply go through the markets, and add each Same Game Multi to your bet slip. Once on your bet slip, scroll to the bottom and you will be offered a multi price.
However, it is important to note that if you have placed a multi bet containing multiple Same Game Multi’s a Bet Returns will not appear as Bet Returns are only available on regular multis, or single same game multi's .
For multi bets made up of same game multi’s, if there are any voided legs then the specific Same Game Multi will be voided and the remaining legs of the multi will still stand.