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