Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khuc thi con snippets" » "thuc thi con snippets", "chuc thi con snippets", "khac thi con snippets", "khuc thi cong snippets", "khuc thi mon snippets", "khuc chi con 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: (((("khuc thi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khuc thi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khuc thi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khuc thi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.