You can copy and paste the documents into one file if they are short. If they are long, you can merge them.
Here’s how to merge documents in Microsoft Word:
Open the first document in your manuscript.
At the end of the document, place the text cursor.
In the top ribbon, go to the “Insert” tab.
4. Select “Object,” and then select “Text from File” from the drop-down menu.
5. Select the files you want to merge into the current document. Note: Documents will be merged in the order they appear in the file list. To use a different order, insert each file individually.