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

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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