Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han chang o2 snippets" » "san chang o2 snippets", "phan chung o2 snippets", "thon chang o2 snippets", "han hang o2 snippets", "han chan o snippets", "han chang ha 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: (((("han chang o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han chang o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han chang o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han chang o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.