Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tran manh dat slippers" » "tran minh dat slippers", "tran thanh dat slippers", "tran van dat slippers", "tran anh dat slippers", "tran mang dat slippers", "tran manh dat slippery", "tran manh dat 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("tran manh dat slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("tran manh dat slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( tran manh dat slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("tran manh dat slippers"))) or ("locating bug code snippets"))*.