Perhaps you should try some spelling variations:
"viet nang van snippets" » "viet trang van snippets", "viet nam van snippets", "viet anh van snippets", "viet dang van snippets", "viet tang van snippets", "viet lang van snippets", "viet nang van slippers"
"using _ java snippets" » "using _ java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("viet nang van snippets") or ("using _ java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet nang van snippets") OR ("using _ java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet nang van snippets ) or ( using _ java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet nang van snippets") or ("using _ java snippets"))) or ("locating bug code snippets"))*.