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