Thanks LeonidS. There really should be a way to add multiple items and be able to have the field reference more than 31 items. 

As an example... this field, "Brand", has tons of values, and you can select multiples. If needed, also allows for searching. https://preview.algolia.com/instantsearch/  

Other examples that perform a search and allow for multiple selections that references values in DB.

https://select2.org/searching

https://selectize.github.io/selectize.js/

https://harvesthq.github.io/chosen