Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan den cao snippets" » "ban den cao snippets", "van den cao snippets", "dan dung cao snippets", "dan den cac snippets", "dan den cam snippets", "dan vien 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: (((("dan den 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: (((("dan den cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan den cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan den cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.