Perhaps you should try some spelling variations:
"dung java java slippery" » "dung va java slippery", "dung java java slippers"
"tong quan code snippets" » "thong quan code snippets", "tong luan code snippets", "luong quan code snippets", "tong quan che snippets", "tong quan co snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java slippery") OR ("tong quan code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung java java slippery\") OR (\"tong quan code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( dung java java slippery ) OR ( tong quan code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java slippery") OR ("tong quan code snippets"))) OR ("locating bug core snippets"))*.