Perhaps you should try some spelling variations:
"great decrease rate sediments" » "great encrease rate sediments", "great degree rate sediments", "great decrease water sediments", "great decrease dated sediments", "great decrease lake sediments", "great decreased water sediments", "great decreasing rate sediments"
"great increase rate sediments" » "great increase water sediments", "great increase dated sediments", "great increase lake sediments", "great increase data sediments", "great increase rice sediments"

Try widening your search to All Fields.

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"great decrease rate sediments\") OR (\"great increase rate sediments\"))".
• Removing quotes may allow a broader search: (( great decrease rate sediments ) OR ( great increase rate sediments )).
• Adding a wildcard symbol may retrieve word variants: (("great decrease rate sediments") OR ("great increase rate sediments"))*.