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