Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan he cao snippets" » "dan ve cao snippets", "dan de cao snippets", "dan ke cao snippets", "dan he co snippets", "dan te cao snippets", "dan he cac 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 he cao 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 he cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan he cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan he cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.