Perhaps you should try some spelling variations:
"dong huong dat slippers" » "dong thuong dat slippers", "dong duong dat slippers", "cong huong dat slippers", "dong huong dan slippers", "dong thuong dam slippers", "dong huong phat slippers", "dong huong dat slippery", "dong huong 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: (((("dong huong 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: (((("dong huong dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong huong dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong huong dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.