Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"yan xu doi snippets" » "yang xu doi snippets", "ban xu doi snippets", "han xu doi snippets", "yan tu doi snippets", "yan nu doi snippets", "yan su doi 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: (((("yan xu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("yan xu doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( yan xu doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("yan xu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.