Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh pha du snippets" » "danh phap du snippets", "doanh phan du snippets", "danh nhan du snippets", "danh pham duc snippets", "danh pham duy snippets", "danh phan 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: (((("danh pha 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: (((("danh pha du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh pha du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh pha du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.