Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trinh ly lan slippers" » "trinh ky lan slippers", "trinh do lan slippers", "trinh tu lan slippers", "trinh ly luan slippers", "trinh ly lanh slippers", "trinh ly ban slippers", "trinh ly lan slippery", "trinh ly lan 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 ("trinh ly lan slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trinh ly lan slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh ly lan slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh ly lan slippers"))) or ("locating bug code snippets"))*.