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