Perhaps you should try some spelling variations:
"value perception of computer programming" » "value perception of computer program" (Expand search), "value perception of computer programs" (Expand search), "face perception of computer programming" (Expand search), "the perception of computer programming" (Expand search), "time perception of computer programming" (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: "((\"value perception of computer programming\") OR (\"advanced python python computer programming\"))~".
• Removing quotes may allow a broader search: (( value perception of computer programming ) OR ( advanced python python computer programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("value perception of computer programming") OR ("advanced python python computer programming"))*.