Perhaps you should try some spelling variations:
"coder precoder data placement problem" » "coder precoder data management problem" (Expand search), "coder decoder data placement problem" (Expand search), "coder precoder depth placement problem" (Expand search), "coder precoder plate placement problem" (Expand search), "coder precoder and placement problem" (Expand search), "coder recovery data placement 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 precoder data placement problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder data placement problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder data placement problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder data placement problem") OR ("api python python python programming"))*.