Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day nghe cua snippets" » "dang nghe cua snippets", "van nghe cua snippets", "nam nghe cua snippets", "day nghiep cua snippets", "day nghe va snippets", "day nghe che 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: (((("day nghe cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("day nghe cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day nghe cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day nghe cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.