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