Perhaps you should try some spelling variations:
"tran xuan van slippers" » "tran quang van slippers", "tran van van slippers", "tran luan van slippers", "tran quan van slippers", "tran xuan can slippers", "tran xuan van slippery", "tran xuan 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"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tran xuan 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: (((("tran xuan van slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( tran xuan van slippers ) or ( dung java java snippets ))) or ( locating bug code snippets ))*.