Perhaps you should try some spelling variations:
"coder coder scheduling considering problem" » "coder coder modeling considering problem" (Expand search), "coder coder scheduling considerada problema" (Expand search), "coder coder scheduling considerado problema" (Expand search), "coder coder scheduling covering problem" (Expand search), "coder order scheduling considering problem" (Expand search), "coder power scheduling considering problem" (Expand search), "coder model scheduling considering problem" (Expand search), "coder decoder scheduling considering problem" (Expand search), "code code scheduling considering problem" (Expand search), "decoder codec scheduling considering problem" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 scheduling considering problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder scheduling considering problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder scheduling considering problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder scheduling considering problem") OR ("on python python python programming"))*.