Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nham van chi snippets" » "pham van chi snippets", "nha van chi snippets", "nam van chi snippets", "nham van chien snippets", "nham luan chi snippets", "nham van chat 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: (((("nham van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nham van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nham van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nham van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.