Perhaps you should try some spelling variations:
their reprocessing » their processing (Expand search), the reprocessing (Expand search), the preprocessing (Expand search)
decrease covid » increase covid (Expand search), increased covid (Expand search), disease covid (Expand search)
covid decrease » rapid decrease (Expand search), soil decrease (Expand search), via decrease (Expand search)
decrease their » increase their (Expand search), decreases the (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease covid decrease their reprocessing ) OR ( decrease the decrease AND decrease ))~.