Perhaps you should try some spelling variations:
"coder estimation method based problems" » "coder estimation methods based problems" (Expand search), "coder optimization method based problems" (Expand search), "coder evaluation method based problems" (Expand search), "model estimation method based problems" (Expand search), "power estimation method based problems" (Expand search), "color estimation method based problems" (Expand search), "coder estimation method posed problems" (Expand search), "coder estimation method based probes" (Expand search), "coder estimation method basic problems" (Expand search), "coder estimation method and problems" (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)

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 estimation method based problems\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder estimation method based problems ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder estimation method based problems") OR ("api python python python programming"))*.