Perhaps you should try some spelling variations:
"surface functionalized in coverage of" » "surface functionalization in coverage of" (Expand search), "surface functionalized n coverage of" (Expand search), "surface functionalized iron coverage of" (Expand search), "surface functionalized 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"surface functionalized in coverage of\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( surface functionalized in coverage of ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("surface functionalized in coverage of") OR ("using coding python python programming"))*.