Perhaps you should try some spelling variations:
"time estimation using structured programming" » "time estimation using structured programs" (Expand search), "time estimation in structured programming" (Expand search), "time estimation and structured programming" (Expand search), "time estimation using structure programming" (Expand search), "time estimation using unstructured programming" (Expand search), "time estimation using structural programming" (Expand search), "the estimation using structured programming" (Expand search), "state estimation using structured programming" (Expand search), "age estimation using structured programming" (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.

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