Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
doan cap » doanh cao, toan cao, doan va

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: ho chieu sang - ((hanh tranh) OR (thanh trung)) cua thong cong tap ((doan cap) OR (dan ca))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((hanh tranh) or (thanh trung)) cua thong cong tap ((doan cap) or (dan ca))*.