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