Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con voi hoc snippets" » "con coi hoc snippets", "choi voi hoc snippets", "dong voi hoc snippets", "con hoi hoc snippets", "con vi hoc snippets", "con voi ho 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 voi hoc 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 voi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con voi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con voi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.