Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan luat don snippets" » "dan luan don snippets", "dap luat don snippets", "dan lat don snippets", "dan luat dan snippets", "dan luat hon snippets", "dan luat doanh 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: (((("dan luat don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan luat don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan luat don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan luat don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.