Perhaps you should try some spelling variations:
"coder coverage estimation algorithm based" » "coder coverage estimation algorithms based" (Expand search), "coder coverage optimization algorithm based" (Expand search), "coder coverage optimization algorithms based" (Expand search), "coder covariance estimation algorithm based" (Expand search), "code coverage estimation algorithm based" (Expand search), "cancer coverage estimation algorithm based" (Expand search), "center coverage estimation algorithm based" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coverage estimation algorithm based") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coverage estimation algorithm based\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coverage estimation algorithm based ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coverage estimation algorithm based") OR ("_ python python python programming"))*.