Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nan dan co snippets" » "nhan dan co snippets", "nang dan co snippets", "ban dan co snippets", "nan dan cho snippets", "nan dang co snippets", "nan danh co 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: (((("nan dan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nan dan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nan dan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nan dan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.