Perhaps you should try some spelling variations:
thanh trung » thanh tung
dieu tinh » diep tinh, lieu tinh, dien tinh
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
chan cau » phan cau, can cau, chinh cau
so dieu » bo dieu, hoc dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so dieu tinh - thanh trung cua tong ((cong dan) or (cong tac)) chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so dieu tinh - thanh trung cua tong ((cong dan) OR (cong tac)) chan cau.
• Adding a wildcard symbol may retrieve word variants: so dieu tinh - thanh trung cua tong ((cong dan) or (cong tac)) chan cau*.