Perhaps you should try some spelling variations:
"phan kiem code snippets" » "phan kien code snippets", "phan mem code snippets", "van kiem code snippets", "phan kiem code slippers"
"dung mat code snippets" » "duong mat code snippets", "dung dat code snippets", "dung may code snippets", "dung rate code snippets", "dung mat co snippets", "dung mat code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("phan kiem code snippets") or ("dung mat code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan kiem code snippets") OR ("dung mat code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan kiem code snippets ) or ( dung mat code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan kiem code snippets") or ("dung mat code snippets"))) or ("locating bug code snippets"))*.