Perhaps you should try some spelling variations:
"luong ca long snippets" » "luong ca code snippets", "luong cac long snippets", "luong cua long snippets", "luong cao long snippets", "luong cau long snippets", "luong ha long snippets", "luong ca ong 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 ca 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 ca long snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luong ca long snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong ca long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.