Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den nguy doc snippets" » "den ngay doc snippets", "benh nguy doc snippets", "den nguoi doc snippets", "den ngon doc snippets", "den duy doc 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: (((("den nguy doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den nguy doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den nguy doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den nguy doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.