Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cong » thong cong, chong cong, khong con
khong cang » thong cong, hong bang, khong dung
thanh than » thanh thanh, thanh thang, thanh toan
trung cua » truong cua, trung tuan, trung cap
than cau » toan cau, phan cau, than cap
ho lieu » so lieu, co lieu, ho chieu
ho kieu » so kieu, thi kieu, ho chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho lieu) or (ho kieu)) tinh - thanh trung cua ((khong cong) OR (khong cang)) thanh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (ho kieu)) tinh - thanh trung cua ((khong cong) OR (khong cang)) thanh than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) or (ho kieu)) tinh - thanh trung cua ((khong cong) OR (khong cang)) thanh than cau".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) or (ho kieu)) tinh - thanh trung cua ((khong cong) OR (khong cang)) thanh than cau*.