Perhaps you should try some spelling variations:
"am thuoc cong snippets" » "am truoc cong snippets", "am thuoc trong snippets", "am thu cong snippets", "nam thuoc cong snippets", "lam thuoc cong snippets", "am thuc cong snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("am thuoc cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("am thuoc cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( am thuoc cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("am thuoc cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.