Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cum dan du snippets" » "cum danh du snippets", "cua dan du snippets", "cu dan du snippets", "cum dan dau snippets", "cum dan su 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 dan 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 dan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cum dan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cum dan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.