Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc chan den snippets" » "hoc phan den snippets", "hoc chat den snippets", "hoc can den snippets", "hoc cham den snippets", "hoc chen den snippets", "hoc chan doan 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: (((("hoc chan 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: (((("hoc chan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc chan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc chan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.