Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan gen den snippets" » "nhan vien den snippets", "nhan dien den snippets", "nhan tren den snippets", "nhan chen den snippets", "nhan den dien 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: (((("nhan gen den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan gen den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan gen den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan gen den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.