Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe danh do snippets" » "nghe dan do snippets", "nghe sinh do snippets", "nghe san do snippets", "nghe dang do snippets", "nghe danh co snippets", "nghe danh di 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: (((("nghe danh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nghe danh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe danh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe danh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.