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