Perhaps you should try some spelling variations:
"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)
"an introduction qos routing programming" » "an introduction qos routine programming" (Expand search), "an introduction qos routines programming" (Expand search), "an introduction qos computing programming" (Expand search), "an introduction post routing programming" (Expand search), "an introduction to routing programming" (Expand search), "an introduction of routing programming" (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 qos routing programming") OR ("advanced python python computer programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"an introduction qos routing programming\") OR (\"advanced python python computer programming\"))".
• Removing quotes may allow a broader search: (( an introduction qos routing programming ) OR ( advanced python python computer programming )).
• Adding a wildcard symbol may retrieve word variants: (("an introduction qos routing programming") OR ("advanced python python computer programming"))*.