Perhaps you should try some spelling variations:
"duong vuong chi snippets" » "duong truong chi snippets", "duong trong chi snippets", "duong cong chi snippets", "duong vuong thi snippets", "duong vuong phi snippets", "duong thuong chi 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 chi 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 chi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong vuong chi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong vuong chi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.