Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toan van da snippets" » "tran van da snippets", "toan ban da snippets", "tan van da snippets", "toan van dao snippets", "toan van dau snippets", "toan van dan 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: (((("toan van 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: (((("toan van da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan van da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan van da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.