Perhaps you should try some spelling variations:
"cua han danh snippets" » "cua van danh snippets", "cua phan dang snippets", "cua nhan dang snippets", "cua nhan danh snippets", "cua hang danh snippets", "cua phan danh snippets", "cua han danh slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("cua han danh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua han danh snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua han danh snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua han danh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.