Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khuc van can snippets" » "thuc van can snippets", "chuc van can snippets", "phuc van can snippets", "khuc van canh snippets", "khuc van ban snippets", "khuc ban 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: (((("khuc van 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: (((("khuc van can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khuc van can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khuc van can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.