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