Perhaps you should try some spelling variations:
"cong luong cong snippets" » "cong dung cong snippets", "cong trong cong snippets", "cong cong cong snippets", "cong thuong cong snippets", "nang luong cong snippets", "cong dong cong snippets"
"va trinh java snippets" » "van trinh java snippets", "va tinh java snippets", "lap trinh 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: (((("va trinh java snippets") or ("cong luong cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va trinh java snippets") OR ("cong luong cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va trinh java snippets ) or ( cong luong cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va trinh java snippets") or ("cong luong cong snippets"))) or ("locating bug code snippets"))*.