Perhaps you should try some spelling variations:
"_ fe decrease" » "_ e decrease" (Expand Search), "_ fe decreased" (Expand Search), "_ fe increase" (Expand Search)
"_ wt decrease" » "_ wet decrease" (Expand Search), "_ mt decrease" (Expand Search), "_ wt decreased" (Expand Search), "_ wt increase" (Expand Search)
"100 mg decrease" » "100 mg decreased" (Expand Search), "100 mg increase" (Expand Search)
"100 ng decrease" » "100 ng decreased" (Expand Search), "100 ng increase" (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: "((((\"100 mg decrease\") OR (\"100 ng decrease\"))) OR (((\"_ fe decrease\") OR (\"_ wt decrease\"))))~".
• Removing quotes may allow a broader search: (((( 100 mg decrease ) OR ( 100 ng decrease ))) OR ((( _ fe decrease ) OR ( _ wt decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("100 mg decrease") OR ("100 ng decrease"))) OR ((("_ fe decrease") OR ("_ wt decrease"))))*.