Perhaps you should try some spelling variations:
"van chinh code snippets" » "van chinh cong snippets", "van chinh che snippets", "va chinh code snippets", "van thinh code snippets", "hanh chinh code snippets", "van chinh 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: "((((\"dung java java snippets\") OR (\"van chinh code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( van chinh code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("van chinh code snippets"))) OR ("locating bug code snippets"))*.