Perhaps you should try some spelling variations:
significant increases » significant increase (Expand Search), significantly increased (Expand Search), significant decrease (Expand Search)
increases crash » increased crash (Expand Search), increases cgas (Expand Search), increases risk (Expand Search)
fold decrease » fold increase (Expand Search), fold increased (Expand Search)
all decrease » small decrease (Expand Search), a decrease (Expand Search), awd decreased (Expand Search)

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: "(( significant increases crash ) OR ( significant ((all decrease) OR (fold decrease)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( significant increases crash ) OR ( significant ((all decrease) OR (fold decrease)) ))*.