Perhaps you should try some spelling variations:
"dong sinh trac slippers" » "duong sinh trac slippers", "dong kinh trac slippers", "dang sinh trac slippers", "dong sinh thai slippers", "dong sinh thuc slippers", "dong anh trac slippers", "dong sinh trac slippery", "dong sinh trac 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 sinh trac 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 sinh trac slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong sinh trac slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong sinh trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.