Perhaps you should try some spelling variations:
"theory computation of visual programing" » "theory computations of visual programing" (Expand search), "theory competition of visual programing" (Expand search), "the computation of visual programing" (Expand search), "theory computation of visual programming" (Expand search), "theory computation of virtual programming" (Expand search), "theory computation of visual programa" (Expand search)
"using python python python programming" » "using pythons python python programming" (Expand search), "using piton python python programming" (Expand search), "using pitons python python programming" (Expand search), "usando python python python programming" (Expand search), "in python python python 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: (("theory computation of visual programing") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"theory computation of visual programing\") OR (\"using python python python programming\"))".
• Removing quotes may allow a broader search: (( theory computation of visual programing ) OR ( using python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("theory computation of visual programing") OR ("using python python python programming"))*.