Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nha san da snippets" » "nha sang da snippets", "nha van da snippets", "pha san da snippets", "nha san dam snippets", "nha ban da snippets", "nha dan da 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: (((("nha san da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nha san da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nha san da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nha san da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.