Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan han lee snippets" » "dan chan lee snippets", "dan than lee snippets", "dan hanh lee snippets", "dan han lew snippets", "dan tan lee snippets", "dan shin lee 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 han lee 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 han lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan han lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan han lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.