Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan danh co snippets" » "van danh co snippets", "han danh co snippets", "ban danh co snippets", "dan danh cho snippets", "dan doanh co snippets", "dan anh 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: (((("dan danh 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: (((("dan danh co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan danh co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan danh co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.