Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day dan toan snippets" » "day van toan snippets", "day dan than snippets", "day manh toan snippets", "day danh toan snippets", "dao dan toan snippets", "cay dan 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: (((("day dan 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: (((("day dan toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day dan toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day dan toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.