Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong hat den snippets" » "cong nhat den snippets", "cong chat den snippets", "cong ha den snippets", "cong hoat den snippets", "cong hat dan snippets", "cong hat 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: (((("cong hat 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: (((("cong hat den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hat den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hat den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.