Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau lanh son snippets" » "cau lanh son snippets", "dat lanh son snippets", "dau tranh son snippets", "dau anh son snippets", "dau lang son snippets", "dau thanh son 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 lanh son 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 lanh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau lanh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau lanh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.