Perhaps you should try some spelling variations:
"coder implementation of loading problem" » "code implementation of loading problem" (Expand search), "decoder implementation of loading problem" (Expand search), "model implementation of loading problem" (Expand search), "coder implementation of routing problem" (Expand search), "coder implementation of planning problem" (Expand search)
"python code in python programming" » "python code _ python programming" (Expand search), "python code and 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 implementation of loading problem") OR ("python code in python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder implementation of loading problem\") OR (\"python code in python programming\"))".
• Removing quotes may allow a broader search: (( coder implementation of loading problem ) OR ( python code in python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder implementation of loading problem") OR ("python code in python programming"))*.