Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc han lee snippets" » "doc hanh lee snippets", "doc phan lee snippets", "doc than lee snippets", "doc han lew snippets", "doc tan lee snippets", "doc 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: (((("doc 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: (((("doc han lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc han lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc han lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.