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