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