Perhaps you should try some spelling variations:
"hoang van java snippets" » "hang va java snippets", "hoang van java slippers"
"dong bang code snippets" » "dong san code snippets", "dong bang cong snippets", "dong bang che snippets", "dong bang cot snippets", "dong bang code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("hoang van java snippets") or ("dong bang code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoang van java snippets") OR ("dong bang code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoang van java snippets ) or ( dong bang code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang van java snippets") or ("dong bang code snippets"))) or ("locating bug code snippets"))*.