Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc si cao snippets" » "duoc si cao snippets", "duc sy cao snippets", "duc so cao snippets", "duc su cao snippets", "duc si cay snippets", "duc sieu cao 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: (((("duc si cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc si cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc si cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc si cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.