Perhaps you should try some spelling variations:
"cong cong che snippets" » "cong dong che snippets", "trong cong che snippets", "dang cong che snippets", "cong cong cho snippets", "cong cong chi snippets", "cong cong chu snippets"
"dung cong core snippets" » "dung trong core snippets", "dung cong co snippets", "dung cong coc snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("cong cong che snippets") or ("dung cong core snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong cong che snippets") OR ("dung cong core snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cong che snippets ) or ( dung cong core snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cong che snippets") or ("dung cong core snippets"))) or ("locating bug code snippets"))*.