Perhaps you should try some spelling variations:
"nhung duoc 2 snippets" » "nhung cuoc 2 snippets", "nhung buoc 2 snippets", "thuong duoc 2 snippets", "nhung doc 2 snippets", "nhung duoc 1 snippets", "nhung duoc 9 snippets", "nhung duoc 2 slippers"
"python using java snippets" » "python using data snippets", "python using java 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: (((("nhung duoc 2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhung duoc 2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung duoc 2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung duoc 2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.