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