Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"hoc dan doc snippets" » "hoc dan toc snippets", "hoc dan hoc snippets", "hoc dan soc snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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: "((((\"hoc dan doc snippets\") OR (\"python using code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( hoc dan doc snippets ) OR ( python using code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("hoc dan doc snippets") OR ("python using code snippets"))) OR ("locating bug code snippets"))*.