Perhaps you should try some spelling variations:
"coder coder fresnel linear programming" » "coder coletor fresnel linear programming" (Expand search), "coder solar fresnel linear programming" (Expand search), "coder cost fresnel linear programming" (Expand search), "coder decoder fresnel linear programming" (Expand search), "code code fresnel linear programming" (Expand search), "decoder codec fresnel linear programming" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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: (("coder coder fresnel linear programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder fresnel linear programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder fresnel linear programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder fresnel linear programming") OR ("on python python python programming"))*.