Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"zhan gao do snippets" » "han gao do snippets", "than giao do snippets", "hat gao do snippets", "zhan dao do snippets", "zhan cao do snippets", "zhan gap 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: (((("zhan gao 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: (((("zhan gao do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( zhan gao do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("zhan gao do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.