Perhaps you should try some spelling variations:
"an introduction in computer programsrs" » "an introduction in computer programmers" (Expand search), "an introduction in computer programs" (Expand search), "an introduction in computer programmes" (Expand search), "an introduction and computer programsrs" (Expand search), "an introduction to computer programsrs" (Expand search), "an introduction of computer programsrs" (Expand search), "an introduction _ computer programsrs" (Expand search), "an introduction in computer programasrs" (Expand search)
"advanced python python computer program" » "advanced method python computer program" (Expand search), "advanced path python computer program" (Expand search), "advanced symphony python computer program" (Expand search), "advanced pythons python computer program" (Expand search), "advanced piton python computer program" (Expand search), "advanced pitons python computer program" (Expand search), "advanced python python computer programa" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("an introduction in computer programsrs") OR ("advanced python python computer program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"an introduction in computer programsrs\") OR (\"advanced python python computer program\"))".
• Removing quotes may allow a broader search: (( an introduction in computer programsrs ) OR ( advanced python python computer program )).
• Adding a wildcard symbol may retrieve word variants: (("an introduction in computer programsrs") OR ("advanced python python computer program"))*.