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