Perhaps you should try some spelling variations:
"hoc trinh code snippets" » "hoc trinh cong snippets", "hoc trinh co snippets", "hoc trinh cad snippets", "doc trinh code snippets", "hoc tinh code snippets", "hoc sinh code snippets", "hoc trinh 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 (\"hoc trinh code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( hoc trinh code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("hoc trinh code snippets"))) OR ("locating bug code snippets"))*.