Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con hoc doi snippets" » "co hoc doi snippets", "mon hoc doi snippets", "toan hoc doi snippets", "con hoc dai snippets", "con hoc noi snippets", "con hoc moi 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 doi 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 doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con hoc doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con hoc doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.