Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap hoc se snippets" » "phap hoan se snippets", "phap mo se snippets", "phap han se snippets", "phap hoc su snippets", "phap hoc he snippets", "phap hoc te 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: (((("phap hoc se snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap hoc se snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap hoc se snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap hoc se snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.