Perhaps you should try some spelling variations:
"dong ninh phi slippers" » "dong kinh phi slippers", "dung ninh phi slippers", "dong tinh phi slippers", "dong linh phi slippers", "dong ninh thi slippers", "dong ninh phi slippery", "dong ninh phi 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 ninh phi 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 ninh phi slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong ninh phi slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong ninh phi slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.