Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luan doi cao snippets" » "luan doi code snippets", "quan doi cao snippets", "lua doi cao snippets", "luan gioi cao snippets", "luan do cao snippets", "luan doi co snippets", "luan doc cao snippets"
"python using java snippets" » "python using data 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 doi cao snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan doi cao snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luan doi cao snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan doi cao snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.