Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
cang dan » cong dan, canh dan, dang dan
tang dan » tang van, tung dan, tang luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu tinh - thanh trung cua khong ((cang dan) OR (tang dan)) phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - thanh trung cua khong ((cang dan) OR (tang dan)) phan tu".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - thanh trung cua khong ((cang dan) OR (tang dan)) phan tu*.