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