Perhaps you should try some spelling variations:
"viet dung java snippets" » "viet hung java snippets", "viet huong java snippets", "viet trung java snippets", "viet dung va snippets", "viet dung java slippers"
"using sat java snippets" » "using data java snippets", "using a java snippets", "using raw java snippets", "using sat va snippets", "using sat java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("viet dung java snippets") or ("using sat java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet dung java snippets") OR ("using sat java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet dung java snippets ) or ( using sat java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet dung java snippets") or ("using sat java snippets"))) or ("locating bug code snippets"))*.