Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan duc deu snippets" » "pham duc deu snippets", "phan tu deu snippets", "phan dau deu snippets", "phan duc dien snippets", "phan duc hieu snippets", "phan dung deu 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: (((("phan duc deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan duc deu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan duc deu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan duc deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.