Perhaps you should try some spelling variations:
"coder training enhances coverage complexity" » "coder training enhances average complexity" (Expand search), "coder training enhances governance complexity" (Expand search), "coder training enhances convergence complexity" (Expand search), "coder training spaces coverage complexity" (Expand search), "coder training induces coverage complexity" (Expand search), "coder training enhanced coverage complexity" (Expand search), "coder training changes coverage complexity" (Expand search), "coder training enhances tolerance complexity" (Expand search), "power training enhances coverage complexity" (Expand search), "model training enhances coverage complexity" (Expand search), "under training enhances coverage complexity" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 training enhances coverage complexity\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder training enhances coverage complexity ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder training enhances coverage complexity") OR ("_ python python python programming"))*.