Perhaps you should try some spelling variations:
observed programming » oriented programming (Expand search), based programming (Expand search), bilevel programming (Expand search)
decrease observed » case observed (Expand search), decay observed (Expand search)
increase their » increase the (Expand search), increases the (Expand search), increased the (Expand search)
their decrease » the decrease (Expand search), their disease (Expand search), the decreased (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.

• Removing quotes may allow a broader search: (( increase their decrease observed programming ) OR ( python _ python python programming ))~.