Perhaps you should try some spelling variations:
"duong cac dat slippers" » "luong cac dat slippers", "dung cac dat slippers", "cuong cac dat slippers", "duong cac dan slippers", "duong cai dat slippers", "duong cac dai slippers", "duong cac dat slippery", "duong cac dat 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: (((("duong cac dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong cac dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong cac dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong cac dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.