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