Perhaps you should try some spelling variations:
"coder coding efficiency perceptions of" » "coder coding deficiency perception of" (Expand search), "coder coding efficacy perception of" (Expand search), "coder coding insufficiency perception of" (Expand search), "coder feeding efficiency perceptions of" (Expand search), "coder cutting efficiency perceptions of" (Expand search), "coder modelling efficiency perceptions of" (Expand search), "coder coding efficiency perception of" (Expand search), "modern coding efficiency perceptions of" (Expand search), "color coding efficiency perceptions of" (Expand search), "odor coding efficiency perceptions of" (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), "rpa python 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: "((\"coder coding efficiency perceptions of\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding efficiency perceptions of ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding efficiency perceptions of") OR ("api python python python programming"))*.