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