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