Perhaps you should try some spelling variations:
"based mathematical geosciences" » "based mathematical science", "basic mathematical geosciences"
"applied mathematical sciences" » "appendix mathematical sciences", "advanced mathematical sciences"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("based mathematical geosciences") OR ("applied mathematics science"))) OR ("applied mathematical sciences")).
• Removing quotes may allow a broader search: (((( based mathematical geosciences ) or ( applied mathematics science ))) or ( applied mathematical sciences )).
• Adding a wildcard symbol may retrieve word variants: (((("based mathematical geosciences") or ("applied mathematics science"))) or ("applied mathematical sciences"))*.