Perhaps you should try some spelling variations:
"nhat danh trinh slippers" » "nhat hanh trinh slippers", "nhat anh trinh slippers", "nhat dan trinh slippers", "nhat ban trinh slippers", "nhat danh trinh slippery", "nhat danh trinh grippers"
"dung java java snippets" » "dung va java 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: (((("nhat danh trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat danh trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat danh trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat danh trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.