Perhaps you should try some spelling variations:
"dung thien van snippets" » "dung chien van snippets", "dung tien van snippets", "dang thien van snippets", "dung thi van snippets", "dung thien van 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"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung thien van snippets") OR ("using sat java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( dung thien van snippets ) or ( using sat java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung thien van snippets") or ("using sat java snippets"))) or ("locating bug code snippets"))*.