Perhaps you should try some spelling variations:
"dung phan cong snippets" » "dung nhan cong snippets", "dung luan cong snippets", "dung ha cong snippets", "dung thanh cong snippets"
"hang o2 code snippets" » "hang hoa code snippets", "hang rok code snippets", "hang ton code snippets", "hang o2 core snippets"
"locating bug code snippets" » "locating bug core 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: (((("hang o2 code snippets") or ("dung phan cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang o2 code snippets") OR ("dung phan cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang o2 code snippets ) or ( dung phan cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang o2 code snippets") or ("dung phan cong snippets"))) or ("locating bug code snippets"))*.