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