Dear Fauziah Baharom There are various ways to achieve this goal:
-Contact a reputed publisher and let them assist you, see for example https://www.springer.com/us/authors-editors/conference-proceedings
-Contact one of the well-known proceeding titles and discuss the possibilities, see for a list enclosed file and go to the Tab Conference proceedings
-Contact one of journals in your field of interest and see If they are willing to publish (a selection of) the conference manuscripts. Usually this is in a special issue, see for an example here https://journals.sagepub.com/jrpa/specialissuepolicy?pbEditor=true
-Of course, you can as indicated by Mustafa Ali Abuzaraida contact the service team of Scopus and see if they can be of any help