Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con hoc hoi snippets" » "co hoc hoi snippets", "mon hoc hoi snippets", "toan hoc hoi snippets", "con hoc khoi snippets", "con hoc hoa snippets", "con hoc noi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("con hoc hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("con hoc hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con hoc hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con hoc hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.