Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cong tinh » cong trinh, cong vinh, long tinh
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((trung tuan) or (tranh cua)) nhung cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trung tuan) OR (tranh cua)) nhung cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trung tuan) or (tranh cua)) nhung cong tinh toan cau*.