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

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: (("based mathematical geosciences") OR ("advanced mathematical geosciences")).
• Removing quotes may allow a broader search: (( based mathematical geosciences ) or ( advanced mathematical geosciences )).
• Adding a wildcard symbol may retrieve word variants: (("based mathematical geosciences") or ("advanced mathematical geosciences"))*.