Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trong quan » thong quan, tong quan, thong quang
tran tuan » tran xuan, tran quang, tran thanh
dung cong » dung trong
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - hanh ((trong quan) OR (tran tuan)) dung cong tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chieu sang)) - hanh ((trong quan) or (tran tuan)) dung cong tinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chieu sang)) - hanh ((trong quan) or (tran tuan)) dung cong tinh toan cau*.