Perhaps you should try some spelling variations:
"wang dong dat slippers" » "nang dong dat slippers", "lang dong dat slippers", "quang dong dat slippers", "wang dong vat slippers", "wang dung dat slippers", "wang dong ha slippers", "wang dong dat slippery", "wang dong 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: (((("wang dong 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: (((("wang dong dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wang dong dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wang dong dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.