Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xac thi hoan snippets" » "xac thi hoa snippets", "xac thi hanh snippets", "xac thi hong snippets", "cac thi hoan snippets", "tac thi hoan snippets", "cac thoi 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: (((("xac 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: (((("xac thi hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xac thi hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xac thi hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.