Perhaps you should try some spelling variations:
thieu nganh » hieu nganh, trien nganh, nghiep nganh
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu nganh - thanh trung cua tong ((cong dan) OR (cong san)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu nganh - thanh trung cua tong ((cong dan) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: toc thieu nganh - thanh trung cua tong ((cong dan) OR (cong san)) than cau*.