Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
hanh cua » manh cua, hang cua, hanh sua
cong sat » cong suat, cong san, cong hat
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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: theo chieu sang - lan ((hanh cua) OR (doanh cua)) nhung cong sat ((phan cau) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - lan ((hanh cua) or (doanh cua)) nhung cong sat ((phan cau) OR (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - lan ((hanh cua) or (doanh cua)) nhung cong sat ((phan cau) OR (phan cac))*.