Perhaps you should try some spelling variations:
trang thuat » trang thuc, trang thiet, trang tuan
trong thuat » trong hoat, trong thu, trong phat
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
xung cong » xuong cong, dung cong, luong cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) OR (hieu lang)) - thanh ((trang thuat) or (trong thuat)) xung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh ((trang thuat) OR (trong thuat)) xung cong manh toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - thanh ((trang thuat) or (trong thuat)) xung cong manh toan cau*".