Perhaps you should try some spelling variations:
"van dung code snippets" » "van dung cong snippets", "van dung co snippets", "van dung de snippets", "van dong code snippets", "xay dung code snippets", "tin dung code snippets", "van dung code slippers"
"dan va code snippets" » "doan va code snippets", "dan ca code snippets", "ban va code snippets", "dan va 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: (((("dan va code snippets") or ("van dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan va code snippets") OR ("van dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan va code snippets ) or ( van dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan va code snippets") or ("van dung code snippets"))) or ("locating bug code snippets"))*.