Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu ba can snippets" » "ngu ca can snippets", "ngu va can snippets", "ngu ta can snippets", "ngu ban can snippets", "ngu bat can snippets", "ngu bac can 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: (((("ngu ba can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu ba can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu ba can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu ba can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.