Perhaps you should try some spelling variations:
"coder costing model using reference" » "order costing model using reference" (Expand search), "powder coating model using reference" (Expand search), "other costing model using reference" (Expand search), "coder coupling model using reference" (Expand search), "coder ising model using reference" (Expand search), "coder cost model using reference" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ 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 costing model using reference\") OR (\"in python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder costing model using reference ) OR ( in python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder costing model using reference") OR ("in python python python programming"))*.