Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh ca do snippets" » "dan ca do snippets", "doanh cua do snippets", "danh cho do snippets", "danh ca dao snippets", "danh cau do snippets", "danh cap do 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 ca do 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 ca do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh ca do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh ca do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.