Perhaps you should try some spelling variations:
"dong trinh khai slippers" » "cong trinh khai slippers", "dong tinh khai slippers", "dong tranh khai slippers", "dong trinh kham slippers", "dong trinh han slippers", "dong trinh tai slippers", "dong trinh khai slippery", "dong trinh khai 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 trinh khai 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 trinh khai slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong trinh khai slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong trinh khai slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.