Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngan dan he snippets" » "ngan danh he snippets", "nhan dan he snippets", "ngan han he snippets", "ngan dan ve snippets", "ngan dan de snippets", "ngan dan ke 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 he 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 he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngan dan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngan dan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.