Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, truong thanh
tran tuan » tran xuan, tran quang, tran thanh
nang cong » nang song, dang cong, bang cong
theo cuu » theo chu, khao cuu, thao cua
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo cuu tinh - hanh ((trung tuan) or (tran tuan)) nang cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cuu tinh - hanh ((trung tuan) OR (tran tuan)) nang cong san phan cau.
• Adding a wildcard symbol may retrieve word variants: theo cuu tinh - hanh ((trung tuan) or (tran tuan)) nang cong san phan cau*.