Perhaps you should try some spelling variations:
"_ fe decrease" » "_ e decrease" (Expand Search), "_ fe decreased" (Expand Search), "_ fe increase" (Expand Search)
"100 ng decrease" » "100 ng decreased" (Expand Search), "100 ng increase" (Expand Search)
"a e decrease" » "a e decreased" (Expand Search), "a e increase" (Expand Search)
"a rare decrease" » "a rare decreased" (Expand Search), "a rare increase" (Expand Search), "a rate decrease" (Expand Search), "a care decrease" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("100 ng decrease") OR ((("a e decrease") OR ((("_ fe decrease") OR ("a rare decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"100 ng decrease\") OR (((\"a e decrease\") OR (((\"_ fe decrease\") OR (\"a rare decrease\"))))))*".
• Removing quotes may allow a broader search: (( 100 ng decrease ) OR ((( a e decrease ) OR ((( _ fe decrease ) OR ( a rare decrease ))))))*.