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