Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sai van toan snippets" » "sai van tuan snippets", "sai van tan snippets", "sai van thanh snippets", "san van toan snippets", "hai van toan snippets", "mai van toan 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: (((("sai van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sai van toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sai van toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sai van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.