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