Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi han lee snippets" » "doi nhan lee snippets", "doi hanh lee snippets", "dai han lee snippets", "doi han lew snippets", "doi tan lee snippets", "doi shin lee 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: (((("doi han lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi han lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi han lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi han lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.