Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban hoc can snippets" » "bang hoc can snippets", "van hoc can snippets", "bai hoc can snippets", "ban hoc dan snippets", "ban hoc cao snippets", "ban 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: (((("ban 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: (((("ban hoc can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban hoc can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban hoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.