Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cum danh hoc snippets" » "cuon danh hoc snippets", "nam danh hoc snippets", "cum dan hoc snippets", "cum danh hoa snippets", "cum anh hoc 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: (((("cum danh hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cum danh hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cum danh hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cum danh hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.