Perhaps you should try some spelling variations:
"coder model using multiple diffraction" » "coder model using multiple reaction" (Expand search), "coder model using multiple generation" (Expand search), "coder model using multi diffraction" (Expand search), "cover model using multiple diffraction" (Expand search), "decoder model using multiple diffraction" (Expand search), "copper model using multiple diffraction" (Expand search)
"via python python python programming" » "via pythons python python programming" (Expand search), "via piton python python programming" (Expand search), "via pitons 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder model using multiple diffraction\") OR (\"via python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder model using multiple diffraction ) OR ( via python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder model using multiple diffraction") OR ("via python python python programming"))*.