Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chang xu doi snippets" » "chang xue doi snippets", "chao xu doi snippets", "thong xu doi snippets", "chang tu doi snippets", "chang nu doi snippets", "chang 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: (((("chang 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: (((("chang xu doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chang xu doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chang xu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.