Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan phan di snippets" » "luan van di snippets", "luan hoan di snippets", "luan phan dai snippets", "luan phan bi snippets", "luan phan do 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 phan di 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 phan di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan phan di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan phan di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.