Perhaps you should try some spelling variations:
"surface functionals in coverage of" » "surface functional in coverage of" (Expand search), "surface functionalised in coverage of" (Expand search), "surface functionality in coverage of" (Expand search), "surface functions in coverage of" (Expand search), "surface functional index coverage of" (Expand search), "surface functionals and coverage of" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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: (("surface functionals in coverage of") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"surface functionals in coverage of\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( surface functionals in coverage of ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("surface functionals in coverage of") OR ("using coding python python programming"))*.