Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao nam cao snippets" » "dao nam cao snippets", "nam nam cao snippets", "ngoc nam cao snippets", "nao nam sao snippets", "nao nam giao 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 nam cao 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 nam cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao nam cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao nam cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.