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