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