Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"luan van phi slippers" » "luan van chi slippers", "luan van phu slippers", "luan van nhi slippers", "quan van phi slippers", "lan van phi slippers", "luan van phi slippery", "luan van phi grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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 ("luan van phi slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("luan van phi slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( luan van phi slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("luan van phi slippers"))) or ("locating bug code snippets"))*.