Perhaps you should try some spelling variations:
"graph computation using optical programming" » "graph computation using logical programming" (Expand search), "graph computation using pascal programming" (Expand search), "graph computation using musical programming" (Expand search), "graphic computation using optical programming" (Expand search), "path computation using optical programming" (Expand search), "group computation using optical programming" (Expand search), "graph computations using optical programming" (Expand search), "graph computation in optical programming" (Expand search), "graph composition using optical programming" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python 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: "((\"graph computation using optical programming\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( graph computation using optical programming ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("graph computation using optical programming") OR ("using coding python python programming"))*.