Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban than o2 snippets" » "ban thanh o2 snippets", "van thanh o2 snippets", "ban hang o2 snippets", "ban than o snippets", "ban than doc snippets", "ban than hoc 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: (((("ban than 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: (((("ban than o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban than o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban than o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.