Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lon voi cong snippets" » "lon noi cong snippets", "lon moi cong snippets", "lon tai cong snippets", "lon loi cong snippets", "lon vi cong snippets", "lon vo cong 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: (((("lon voi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lon voi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lon voi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lon voi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.