Perhaps you should try some spelling variations:
"them thanh hien tinh f.c." » "thien thanh hien tinh f.c.", "thi thanh hien tinh f.c.", "pham thanh hien tinh f.c.", "them thanh vien tinh f.c.", "them thanh nien tinh f.c.", "them thanh huyen tinh f.c.", "them thanh khien tinh f.c.", "them thanh thien tinh f.c.", "them thanh bien tinh f.c.", "them thanh hien tinh hoc.", "them thanh hien tinh bac.", "them thanh hien tinh duc."
"thep hanh va dinh doc." » "thep hinh va dinh doc.", "thuc hanh va dinh doc.", "thi hanh va dinh doc.", "thep hanh va dinh duc.", "thep hanh va dinh ngoc.", "thep hanh va trinh doc.", "thep hang va dinh doc.", "thep hanh vi dinh doc.", "thep hanh van dinh doc.", "thep hanh va kinh doc.", "thep hanh va tinh doc."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("thep hanh va dinh doc.") OR ("them thanh hien tinh f.c."))~.
• Removing quotes may allow a broader search: (( thep hanh va dinh doc. ) or ( them thanh hien tinh f.c. ))~.
• Adding a wildcard symbol may retrieve word variants: (("thep hanh va dinh doc.") or ("them thanh hien tinh f.c."))*.