Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khe thi doan snippets" » "khe thai doan snippets", "khe thi hoan snippets", "khe thi loan snippets", "ke thi doan snippets", "nghe thi doan snippets", "phe thai doan 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: (((("khe thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khe thi doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khe thi doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khe thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.