Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
phan dang » phan dau, phan cong, nhan dan
dang luan » dung luan, tang luan, hang luan
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
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: doi ((hieu manh) or (chieu sang)) - phan dang luan ((dong cong) OR (dang cong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu sang)) - phan dang luan ((dong cong) OR (dang cong)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chieu sang)) - phan dang luan ((dong cong) OR (dang cong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chieu sang)) - phan dang luan ((dong cong) OR (dang cong)) manh toan cau*.