Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trac hoc danh slippers" » "toan hoc danh slippers", "thai hoc danh slippers", "toc hoc danh slippers", "trac hoc dan slippers", "trac hoc anh slippers", "trac hoc hanh slippers", "trac hoc danh slippery", "trac hoc 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: (((("trac hoc 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: (((("trac hoc danh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trac hoc danh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trac hoc danh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.