Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa xa can snippets" » "hoa xa can snippets", "khoa ma can snippets", "khoa x can snippets", "khoa xa cao snippets", "khoa xa ban snippets", "khoa xa tan 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: (((("khoa xa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa xa can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa xa can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa xa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.