Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua thi doan snippets" » "cua thai doan snippets", "cua thi hoan snippets", "cua thi loan snippets", "cua thoi doan snippets", "cua toi doan snippets", "cua chi 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: (((("cua 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: (((("cua thi doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua thi doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.