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