Perhaps you should try some spelling variations:
"coder and coverage problem based" » "coder and covering problem based" (Expand search), "coder and cover problem based" (Expand search), "coder and covering problems based" (Expand search), "code and coverage problem based" (Expand search), "codes and coverage problem based" (Expand search), "poder and coverage problem based" (Expand search)
"via python python python programming" » "via pythons python python programming" (Expand search), "via piton python python programming" (Expand search), "via pitons python python programming" (Expand search), "in 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 and coverage problem based\") OR (\"via python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder and coverage problem based ) OR ( via python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder and coverage problem based") OR ("via python python python programming"))*.