Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
cong phuong » cong thuong, cong huong, dong phuong
chieu sang » chieu sach, chieu xanh, hieu lang
trinh than » trinh thanh, trinh han, trinh toan
trung cua » truong cua, trung tuan, trung cap
tung cua » tuong cua, dung cua, tang cua
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (chinh sach)) - manh ((tung cua) OR (trung cua)) cong phuong trinh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chinh sach)) - manh ((tung cua) OR (trung cua)) cong phuong trinh than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (chinh sach)) - manh ((tung cua) OR (trung cua)) cong phuong trinh than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chinh sach)) - manh ((tung cua) OR (trung cua)) cong phuong trinh than cau*.