Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thach nam da snippets" » "thanh nam da snippets", "thach lam da snippets", "hanh nam da snippets", "thach nam dan snippets", "thach nam a snippets", "thach nam 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: (((("thach nam 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: (((("thach nam da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thach nam da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thach nam da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.