Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan dang c1 snippets" » "nhan dan c1 snippets", "phan dang c1 snippets", "tran dang c1 snippets", "nhan dang ca snippets", "nhan dang cn snippets", "nhan dang 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 dang c1 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 dang c1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan dang c1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan dang c1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.