Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong ban » cong bang, cong san, cong tan
than cao » thai cao, than cap, than sao
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: ho ((hieu manh) OR (chieu sang)) - canh tranh cua dung cong ban ((than cao) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sang)) - canh tranh cua dung cong ban ((than cao) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - canh tranh cua dung cong ban ((than cao) OR (toan cao))*.