Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhu hai den snippets" » "thu hai den snippets", "nhu tai den snippets", "thu hoai den snippets", "nhu thai den snippets", "nhu hai yen snippets", "nhu hai 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: (((("nhu hai 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: (((("nhu hai den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhu hai den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhu hai den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.