Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
thanh tap » thanh tai, thanh tay, thanh tam
thanh lap » thanh san, phan lap, thanh hai

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 - hanh tranh cua ((nhung cong) OR (han tong)) van ((thanh tap) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh tranh cua ((nhung cong) or (han tong)) van ((thanh tap) OR (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tranh cua ((nhung cong) or (han tong)) van ((thanh tap) OR (thanh lap))*.