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