Perhaps you should try some spelling variations:
"tran hung dan slippers" » "tran hong dan slippers", "tran quang dan slippers", "tran hoang dan slippers", "tran huong dan slippers", "tran dung dan slippers", "tran tung dan slippers", "tran hung dan slippery", "tran hung dan 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: (((("tran hung dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hung dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran hung dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran hung dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.