Perhaps you should try some spelling variations:
"advanced mathematical geosciences" » "advanced mathematical science", "advanced mathematics science", "based mathematical geosciences", "advanced mathematical geoscience"
"advanced mathematical sciences" » "based 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 geosciences") OR ("advanced mathematical sciences")).
• Removing quotes may allow a broader search: (( advanced mathematical geosciences ) or ( advanced mathematical sciences )).
• Adding a wildcard symbol may retrieve word variants: (("advanced mathematical geosciences") or ("advanced mathematical sciences"))*.