Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trinh toan » tinh toan, thanh toan, trinh han
hang cong » dang cong, hang nong, bang cong
dinh van » sinh vat
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
phan cau » phan dau, phan cac, phan tu

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 xanh) OR (chieu sach)) - canh ((dinh van) OR (trinh toan)) hang cong van phan cau~.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - canh ((dinh van) or (trinh toan)) hang cong van phan cau*.