Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
trung quan » truong quan, trong quan, trung tuan
trung qua » trong qua, trung cua, truong quan
dung cong » dung trong
toan cau » toan cao, toan ban, toan tap
ty toan » ly toan, tap toan, huy toan

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: doi ((chieu xanh) OR (chieu sang)) - thanh ((trung qua) OR (trung quan)) dung cong ty toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sang)) - thanh ((trung qua) or (trung quan)) dung cong ty toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sang)) - thanh ((trung qua) or (trung quan)) dung cong ty toan cau*.