Before starting to make selections, try changing the look of your page, e.g. all reference abstracts and/or more than 20 results per page, to make selecting easier.
At the foot of the page, select the number of results you want to see per page.
See the records with their abstracts to help you make selections: click the Show all abstracts link.
Select references of interest by ticking the check-box, then use the ... More ellipsis to Save to a List or click on Export to export to reference management software (EndNote / Mendeley).