Perhaps you should try some spelling variations:
"coder function precoder allocation problem" » "coder function power allocation problem" (Expand search), "coder function precoder selection problem" (Expand search), "coder function order allocation problem" (Expand search), "coder function precoder location problem" (Expand search), "coder function precedes allocation problem" (Expand search), "coder function recovery allocation problem" (Expand search), "coder functional recover allocation problem" (Expand search), "modern function precoder allocation problem" (Expand search), "power function precoder allocation problem" (Expand search), "over function precoder allocation problem" (Expand search)
"sensor and python python programming" » "sensor and pythons python programming" (Expand search), "sensor and piton python programming" (Expand search), "sensor and pitons python programming" (Expand search), "sensory and python python programming" (Expand search), "sensors and python python programming" (Expand search), "sensor based python python programming" (Expand search), "sensor in python python programming" (Expand search), "sensor on python python programming" (Expand search), "sensor api 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 function precoder allocation problem") OR ("sensor and python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder function precoder allocation problem\") OR (\"sensor and python python programming\"))".
• Removing quotes may allow a broader search: (( coder function precoder allocation problem ) OR ( sensor and python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder function precoder allocation problem") OR ("sensor and python python programming"))*.