Perhaps you should try some spelling variations:
"tran vang tao snippets" » "tran van tao snippets", "tran dang tao snippets", "tran quang tao snippets", "tran sang tao snippets", "tran nang tao snippets", "tran hang tai snippets", "tran vang tao 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", "locating bug core 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: "((((\"tran vang tao snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( tran vang tao snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("tran vang tao snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.