Perhaps you should try some spelling variations:
rafted sediment » dated sediment, grained sediment, related sediment
great decrease » great increase, great encrease, great degree
get decrease » pets decrease, 1e decrease, 2e decrease

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: "((get decrease) OR (great decrease)) rafted sediment".
• Adding a wildcard symbol may retrieve word variants: ((get decrease) OR (great decrease)) rafted sediment*.