Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan hoc cu snippets" » "van hoc cu snippets", "dan toc cu snippets", "dai hoc cu snippets", "dan hoc cua snippets", "dan hoc cau snippets", "dan hoc chu 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: (((("dan hoc cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan hoc cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan hoc cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hoc cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.