Perhaps you should try some spelling variations:
"and introduction in computer programs" » "an introduction in computer programs" (Expand search), "and introduction and computer programs" (Expand search), "and introduction to computer programs" (Expand search), "and introduction of computer programs" (Expand search), "and introduction _ computer programs" (Expand search), "and introduction in computer programas" (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.

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