Perhaps you should try some spelling variations:
"luong cau long snippets" » "luong cau code snippets", "luong cac long snippets", "luong chu long snippets", "luong cao long snippets", "luong cuu long snippets", "luong cau cong snippets", "luong cau dong snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("luong cau long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong cau long snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luong cau long snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong cau long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.