Perhaps you should try some spelling variations:
their complexes » the complexes (Expand search), chain complexes (Expand search), their competences (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
python their » than their (Expand search), within their (Expand search), python tutor (Expand search)
code python » codigo python (Expand search), pacote python (Expand search)
code code » code cdc (Expand search)

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

• Removing quotes may allow a broader search: (( code code python their complexes ) OR ( _ python python python programming ))~.