Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong va den snippets" » "thong va den snippets", "phung van den snippets", "thong van den snippets", "phong va dien snippets", "phong van den snippets", "phong va de 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: (((("phong va 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: (((("phong va den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong va den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong va den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.