Perhaps you should try some spelling variations:
"dung viet ban slippers" » "nang viet ban slippers", "cong viet ban slippers", "mang viet ban slippers", "dung viet bang slippers", "dung viet van slippers", "dung viec ban slippers", "dung viet ban slippery", "dung viet ban 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 viet ban 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 viet ban slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung viet ban slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung viet ban slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.