Perhaps you should try some spelling variations:
"toc thieu trinh snippets" » "toc tieu trinh snippets", "toc trieu tinh snippets", "toc tien trinh snippets"
"dung cua cong snippets" » "dung luan cong snippets", "dung cho cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("toc thieu trinh snippets") or ("dung cua cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc thieu trinh snippets") OR ("dung cua cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc thieu trinh snippets ) or ( dung cua cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc thieu trinh snippets") or ("dung cua cong snippets"))) or ("locating bug code snippets"))*.