Perhaps you should try some spelling variations:
doanh chung » doanh nhung, doanh thuong, doan hung
trung doanh » trong doanh, trung thanh, dung doanh
manh trung » manh tung, thanh trung, manh hung
chieu sang » chieu sach, chieu xanh, nhieu tang
chung cong » nhung cong, chong cong, phung cong
hieu lang » hieu quang, nhieu tang, hieu van
cong tinh » cong trinh, cong vinh, long tinh
toan cau » toan cao, toan ban, toan tap

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) OR (chieu sang)) - manh trung doanh chung cong tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - manh trung doanh chung cong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - manh trung doanh chung cong tinh toan cau*.