Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sinh hoc den snippets" » "sinh hoc dan snippets", "sinh hoc de snippets", "sinh hoc hien snippets", "dinh hoc den snippets", "minh hoc den snippets", "kinh hoc den 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: (((("sinh hoc 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: (((("sinh hoc den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sinh hoc den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sinh hoc den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.