Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
trinh quan » tinh quang, trinh luat, trinh han
trung cua » truong cua, trung cap, dung cua
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
quan cau » quang cao, toan cau, quan ha

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - thanh ((trung cua) OR (trung tuan)) trong cong trinh quan cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - thanh ((trung cua) or (trung tuan)) trong cong trinh quan cau*.