Perhaps you should try some spelling variations:
copd processes » food processes (Expand search), npd processes (Expand search), coupled processes (Expand search)
decrease root » decrease food (Expand search), decrease soon (Expand search), decreasing root (Expand search)
root disease » root diseases (Expand search), rot disease (Expand search), foot disease (Expand search)
disease copd » disease case (Expand search)
python redes » python regius (Expand search), python code (Expand search)
redes pitons » redes pon (Expand search), redes fito (Expand search), redes ptn (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: "(( decrease root disease copd processes ) OR ( python redes pitons python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease root disease copd processes ) OR ( python redes pitons python programming ))*.