Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong phan van slippers" » "dung phan van slippers", "cong phan van slippers", "dong chan van slippers", "dong pham van slippers", "dong thanh van slippers", "dong luan van slippers", "dong phan van slippery", "dong phan van 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 ("dong phan van slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong phan van slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong phan van slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong phan van slippers"))) or ("locating bug code snippets"))*.