Perhaps you should try some spelling variations:
"based computational _ precoder program" » "and computational _ precoder program" (Expand search), "by computational _ precoder program" (Expand search), "based computational _ proder program" (Expand search), "based computational _ recovery program" (Expand search), "based computational _ precoce programa" (Expand search)
"testing modeling python python programming" » "testing modelling python python programming" (Expand search), "teaching modeling python python programming" (Expand search), "testing models python python programming" (Expand search), "testing modeling vpython python programming" (Expand search), "testing modeling pitting python programming" (Expand search), "testing modeling pythons python programming" (Expand search), "testing modeling piton python programming" (Expand search), "testing modeling pitons python 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: "((\"based computational _ precoder program\") OR (\"testing modeling python python programming\"))~".
• Removing quotes may allow a broader search: (( based computational _ precoder program ) OR ( testing modeling python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computational _ precoder program") OR ("testing modeling python python programming"))*.