Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa mat can snippets" » "khoa ma can snippets", "khoan mot can snippets", "hoa may can snippets", "khoa bat can snippets", "khoa mat dan snippets", "khoa mao can 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 mat 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 mat can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa mat can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa mat can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.