Perhaps you should try some spelling variations:
"miller undergraduate mathematics series" » "mit undergraduate mathematics series", "all undergraduate mathematics series", "better undergraduate mathematics series", "miller undergraduate mathematical series", "miller undergraduate mathematics species", "miller undergraduate mathematics pieri's"
"miller undergraduate mathematics studies" » "mit undergraduate mathematics studies", "all undergraduate mathematics studies", "better undergraduate mathematics studies", "miller undergraduate mathematical studies", "miller undergraduate mathematics study", "miller undergraduate thematic studies"
"miller undergraduate mathematics students" » "mit undergraduate mathematics students", "all undergraduate mathematics students", "better undergraduate mathematics students", "miller undergraduate mathematics study", "miller undergraduate mathematics science", "miller undergraduate mathematics systems"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("miller undergraduate mathematics series") OR ((("miller undergraduate mathematics studies") OR ("miller undergraduate mathematics students")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"miller undergraduate mathematics series\") or (((\"miller undergraduate mathematics studies\") OR (\"miller undergraduate mathematics students\"))))".
• Removing quotes may allow a broader search: (( miller undergraduate mathematics series ) or ((( miller undergraduate mathematics studies ) OR ( miller undergraduate mathematics students )))).
• Adding a wildcard symbol may retrieve word variants: (("miller undergraduate mathematics series") or ((("miller undergraduate mathematics studies") OR ("miller undergraduate mathematics students"))))*.