Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tuc van toan snippets" » "tuc van tuan snippets", "tuc van tan snippets", "tuc van thanh snippets", "thuc van toan snippets", "truc van toan snippets", "tuc va 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: (((("tuc 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: (((("tuc van toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tuc van toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuc van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.