Perhaps you should try some spelling variations:
"tham dinh van tinh f.c." » "nam dinh van tinh f.c.", "thai binh van tinh f.c.", "than kinh van tinh f.c.", "tham sinh vat tinh f.c.", "tham dinh van thinh f.c.", "tham dinh van minh f.c.", "tham dinh ban tinh f.c.", "tham dinh van tinh hoc.", "tham dinh van tinh bac.", "tham dinh van tinh duc."
"tham dinh ban hanh f.c." » "nam dinh ban hanh f.c.", "thai binh ban hanh f.c.", "than kinh ban hanh f.c.", "tham dinh bang hanh f.c.", "tham dinh ba hanh f.c.", "tham sinh ban hanh f.c.", "tham dinh ban hang f.c.", "tham dinh ban hanh cac."
"thep dinh may tinh f.c." » "thep hinh may tinh f.c.", "hiep dinh may tinh f.c.", "phap dinh may tinh f.c.", "thep dinh may tinh hoc.", "thep dinh may tinh bac.", "thep dinh may tinh duc.", "thep trinh may tinh f.c.", "thep dinh moi tinh f.c.", "thep dinh lam tinh f.c."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tham dinh van tinh f.c.") or ("tham dinh ban hanh f.c."))) or ("thep dinh may tinh f.c."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tham dinh van tinh f.c.") OR ("tham dinh ban hanh f.c."))) OR ("thep dinh may tinh f.c."))*.
• Removing quotes may allow a broader search: (((( tham dinh van tinh f.c. ) or ( tham dinh ban hanh f.c. ))) or ( thep dinh may tinh f.c. ))*.