Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tang du snippets" » "duc thang du snippets", "duc tan du snippets", "tuc tang du snippets", "duc nang du snippets", "duc hang dau snippets", "duc dang duc 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: (((("duc tang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc tang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.