Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"zhan gao cho snippets" » "han gao cho snippets", "than giao cho snippets", "hat gao cho snippets", "zhan cao cho snippets", "zhan dao cho snippets", "zhan gac cho 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: (((("zhan gao cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("zhan gao cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( zhan gao cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("zhan gao cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.