Perhaps you should try some spelling variations:
"and optimization by reactive programming" » "and optimization by objective programming" (Expand search), "and optimization by teaching programming" (Expand search), "and optimization by declarative programming" (Expand search), "and optimization _ reactive programming" (Expand search), "and optimization and reactive programming" (Expand search), "and optimization based reactive programming" (Expand search), "and optimization c reactive programming" (Expand search)
"advanced python python computer programming" » "advanced python python computer program" (Expand search), "advanced python python computer programs" (Expand search), "advanced method python computer programming" (Expand search), "advanced path python computer programming" (Expand search), "advanced symphony python computer programming" (Expand search), "advanced pythons python computer programming" (Expand search), "advanced piton python computer programming" (Expand search), "advanced pitons python computer programming" (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: "((\"and optimization by reactive programming\") OR (\"advanced python python computer programming\"))~".
• Removing quotes may allow a broader search: (( and optimization by reactive programming ) OR ( advanced python python computer programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and optimization by reactive programming") OR ("advanced python python computer programming"))*.