Perhaps you should try some spelling variations:
"and introduction _ computers programming" » "and introduction _ computer programming" (Expand search), "and introduction _ computer program" (Expand search), "and introduction _ computer programs" (Expand search), "an introduction _ computers programming" (Expand search)
"advanced python python computer programa" » "advanced python python computer program" (Expand search), "advanced python python computer programs" (Expand search), "advanced python python computer programme" (Expand search), "advanced method python computer programa" (Expand search), "advanced path python computer programa" (Expand search), "advanced symphony python computer programa" (Expand search), "advanced pythons python computer programa" (Expand search), "advanced piton python computer programa" (Expand search), "advanced pitons python computer programa" (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 introduction _ computers programming\") OR (\"advanced python python computer programa\"))~".
• Removing quotes may allow a broader search: (( and introduction _ computers programming ) OR ( advanced python python computer programa ))~.
• Adding a wildcard symbol may retrieve word variants: (("and introduction _ computers programming") OR ("advanced python python computer programa"))*.