Perhaps you should try some spelling variations:
"them thanh nam dinh duc." » "thien thanh nam dinh duc.", "thi thanh nam dinh duc.", "pham thanh nam dinh duc.", "them thanh tam dinh duc.", "them thanh pham dinh duc.", "them thanh nhan dinh duc.", "them thanh nam ninh duc.", "them thanh nam tinh duc.", "them thanh nam sinh duoc.", "them thanh lam dinh duc.", "them thanh ngay dinh duc.", "them thoang nam dinh duc."
"thuc hanh nam dinh duc." » "thuc hanh nam ninh duc.", "thuc hanh nam tinh duc.", "thuc hanh nam sinh duoc.", "thuc hanh lam dinh duc.", "thuc hanh ngay dinh duc.", "thuc hoang nam dinh duc."
"kiem dinh van minh duc." » "kiem sinh vat minh duc."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("them thanh nam dinh duc.") or ("thuc hanh nam dinh duc."))) or ("kiem dinh van minh duc."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("them thanh nam dinh duc.") OR ("thuc hanh nam dinh duc."))) OR ("kiem dinh van minh duc.")).
• Removing quotes may allow a broader search: (((( them thanh nam dinh duc. ) or ( thuc hanh nam dinh duc. ))) or ( kiem dinh van minh duc. )).
• Adding a wildcard symbol may retrieve word variants: (((("them thanh nam dinh duc.") or ("thuc hanh nam dinh duc."))) or ("kiem dinh van minh duc."))*.