Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dang viet do snippets" » "nang viet do snippets", "danh viet do snippets", "mang viet do snippets", "dang viet dao snippets", "dang viet doi snippets", "dang viet o 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: (((("dang viet 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: (((("dang viet do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang viet do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.