Perhaps you should try some spelling variations:
"and optimization _ computer programmers" » "and optimization _ computer programs" (Expand search), "and optimization _ computers programming" (Expand search), "and optimization _ computer program" (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 _ computer programmers\") OR (\"advanced python python computer programming\"))~".
• Removing quotes may allow a broader search: (( and optimization _ computer programmers ) OR ( advanced python python computer programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and optimization _ computer programmers") OR ("advanced python python computer programming"))*.