Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan lieu da snippets" » "luan tieu da snippets", "luan dieu da snippets", "luan hieu da snippets", "luan lieu dao snippets", "luan lieu dai snippets", "luan lieu dia 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: (((("luan lieu 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: (((("luan lieu da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan lieu da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan lieu da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.