Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao chi toan snippets" » "cao khi toan snippets", "cao chi thanh snippets", "cao bai toan snippets", "cao cho toan snippets", "bao chi toan snippets", "cao thi 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: (((("cao chi 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: (((("cao chi toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao chi toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao chi toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.