Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau moi da snippets" » "dai moi da snippets", "dau mo da snippets", "dau mot da snippets", "dau moi dan snippets", "dau moi la snippets", "dau moi va 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: (((("dau moi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau moi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau moi da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau moi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.