Perhaps you should try some spelling variations:
tranh luat » trinh luat, trinh luan, tranh cua
chieu sang » chieu sach, chieu xanh, nhieu tang
tranh luan » trinh luan, trinh luat, doanh luan
trong long » trong luong, truong long, trong cong
hieu lang » hieu quang, nhieu tang, hieu van
long tinh » cong tinh, trong tinh, luong tin
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: doi ((chieu sang) OR (hieu lang)) - canh ((tranh luat) OR (tranh luan)) trong long tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - canh ((tranh luat) OR (tranh luan)) trong long tinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - canh ((tranh luat) OR (tranh luan)) trong long tinh toan cau*.