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