Perhaps you should try some spelling variations:
"coder decoder source localization problem" » "coder decoder source location problem" (Expand search), "coder decoder source localization from" (Expand search), "coder decoder source calibration problem" (Expand search), "coder disorder source localization problem" (Expand search), "coder diode source localization problem" (Expand search), "coder secondary source localization problem" (Expand search), "encoder decoder source localization problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (Expand search), "manim python python 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 decoder source localization problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder source localization problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder source localization problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder source localization problem") OR ("api python python python programming"))*.