Perhaps you should try some spelling variations:
"tran hong dat slippers" » "tran hoang dat slippers", "tran hung dat slippers", "tran trong dat slippers", "tran dong dat slippers", "tran hon dat slippers", "tran hong dat slippery", "tran hong 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"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hong dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( tran hong dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("tran hong dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.