Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hen hoc can snippets" » "hen ho can snippets", "den hoc can snippets", "khien hoc can snippets", "hen hoc dan snippets", "hen hoc cao snippets", "hen hoc cac 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: (((("hen hoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hen hoc can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hen hoc can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hen hoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.