Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xen toan cao snippets" » "xuan toan cao snippets", "dien toan cao snippets", "ke toan cao snippets", "xen toan ban snippets", "xen toan tap 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: (((("xen toan 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: (((("xen toan cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xen toan cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xen toan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.