Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi phan voi snippets" » "phoi phan voi snippets", "chi phan voi snippets", "phe phan voi snippets", "phi pham voi snippets", "phi phan hoi snippets", "phi phan moi 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: (((("phi phan voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi phan voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi phan voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi phan voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.