Perhaps you should try some spelling variations:
"van luong code snippets" » "van luong cong snippets", "van luong che snippets", "van duong code snippets", "van cuong code snippets", "nang luong code snippets", "van luong code slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"van luong code snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( van luong code snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van luong code snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.