Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao nghe cua snippets" » "nam nghe cua snippets", "tao nghe cua snippets", "nang nghe cua snippets", "nao nghiep cua snippets", "nao nghe va snippets", "nao 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: (((("nao 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: (((("nao nghe cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao nghe cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao nghe cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.