Perhaps you should try some spelling variations:
"coder coder coder allocation problem" » "coder coder coder location problem" (Expand search), "coder coder power allocation problem" (Expand search), "coder coder order allocation problem" (Expand search), "coder coder over allocation problem" (Expand search), "coder decoder coder allocation problem" (Expand search), "code code coder allocation problem" (Expand search), "decoder codec coder allocation problem" (Expand search)
"api an python python programming" » "api an pythons python programming" (Expand search), "api an piton python programming" (Expand search), "api an pitons python programming" (Expand search), "api and python python programming" (Expand search), "api in python python programming" (Expand search), "api on 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 coder coder allocation problem") OR ("api an python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder coder allocation problem\") OR (\"api an python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder coder allocation problem ) OR ( api an python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder coder allocation problem") OR ("api an python python programming"))*.