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