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