Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban thi hoan snippets" » "ban thi hoa snippets", "ban thi hanh snippets", "ban thi hong snippets", "dan thi hoan snippets", "van thi hoan snippets", "can thi hoan 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: (((("ban thi hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban thi hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban thi hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban thi hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.