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