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

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("advanced mathematical finance") OR ("appendix mathematical science")).
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