Remember that there are limited abstracts and fewer full text entries in the MLA International Bibliography. Although it is accessed through EBSCOHost, all indexing is done by MLA.
Learn to use the Thesaurus and Names as Subjects features of the MLA Bibliography. Search by the person's last name to find the preferred version of the name to use when searching. Browse the Thesaurus to both narrow and expand your search.
Searching with precise subject terms and names will be more productive than Keyword searching.