Perhaps you should try some spelling variations:
trong doanh » trong nganh
trung doan » trang doan, truong toan, trung hoa
phong cong » phong chong, thong cong, chong cong
hieu lang » chieu sang, hieu quang, nhieu tang
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
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 doan) OR (trong doanh)) phong cong trinh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trung doan) OR (trong doanh)) phong cong trinh ((toan cau) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((trung doan) OR (trong doanh)) phong cong trinh ((toan cau) or (toan ban))*".