Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"tran quang thu snippets" » "tran quang tru snippets", "tran quang phu snippets", "tran quang thi 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 slippers\") OR (\"tran quang thu snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java slippers ) OR ( tran quang thu snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java slippers") OR ("tran quang thu snippets"))) OR ("locating bug core snippets"))*.