Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham doi den snippets" » "pham do den snippets", "pham moi den snippets", "pham voi den snippets", "pham doi dien snippets", "pham di den snippets", "pham doi dan 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 doi 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 doi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham doi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham doi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.