Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dua cao do snippets" » "dua vao do snippets", "juan cao do snippets", "suat cao do snippets", "dua cao dao snippets", "dua cau do snippets", "dua 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: (((("dua cao 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: (((("dua cao do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dua cao do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dua cao do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.