Perhaps you should try some spelling variations:
"nang dua code snippets" » "nang du code snippets", "nang suat code snippets", "nang quan code snippets", "nang dual mode snippets"
"dung cau cong snippets" » "dung chau cong snippets", "dung cu cong snippets", "dung cac cong snippets", "dung cuu cong snippets", "dung cao cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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

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