Perhaps you should try some spelling variations:
"coder coder sources allocation problem" » "coder coder resources allocation problem" (Expand search), "coder coder esource allocation problem" (Expand search), "coder coder resource allocation problem" (Expand search), "coder coder sources location problem" (Expand search), "coder copper sources allocation problem" (Expand search), "coder power sources allocation problem" (Expand search), "coder under sources allocation problem" (Expand search), "coder decoder sources allocation problem" (Expand search), "code code sources allocation problem" (Expand search), "decoder codec sources allocation 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)

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 sources allocation problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sources allocation problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder sources allocation problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder sources allocation problem") OR ("api python python python programming"))*.