Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cum van du snippets" » "cuu van du snippets", "cua van du snippets", "cum dan du snippets", "cum van duy snippets", "cum van dau snippets", "cum van de 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: (((("cum van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cum van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cum van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cum van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.