Perhaps you should try some spelling variations:
computer programs » computer program (Expand search)
pathogen vector » pathogen vectors (Expand search)
vector computer » vector computers (Expand search), reactors computer (Expand search), vector competent (Expand search)
maize pathogen » maize nitrogen (Expand search), main pathogens (Expand search)
coupled python » coupled method (Expand search), coupled position (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (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: "(( maize pathogen vector computer programs ) OR ( _ coupled python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( maize pathogen vector computer programs ) OR ( _ coupled python python programming ))*.