Perhaps you should try some spelling variations:
"van thinh dung slippers" » "van trinh dung slippers", "van tinh dung slippers", "van thanh dung slippers", "van chinh dung slippers", "van minh dung slippers", "van thinh dung slippery", "van thinh dung 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: (((("dung java java snippets") or ("van thinh dung slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van thinh dung slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van thinh dung slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van thinh dung slippers"))) or ("locating bug code snippets"))*.