Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh cua con snippets" » "doanh cua con snippets", "manh cua con snippets", "dinh cua con snippets", "danh cua cong snippets", "danh cua co snippets", "danh cua can 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: (((("danh cua con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh cua con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh cua con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh cua con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.