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