Perhaps you should try some spelling variations:
khia canh » kho canh, thi canh
tranh cua » doanh cua, manh cua
dang cong » dung cong
khi xanh » thi hanh, thi anh, thi oanh
cua dang » cua cong, cua ban
cong van » cong vang, cong san, song van
tuan cau » toan cau, quan cau, tuan cu
toan tap » toan ban

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 ((khi xanh) OR (khia canh)) - canh tranh cua dang cong van ((tuan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((khi xanh) OR (khia canh)) - canh tranh cua dang cong van ((tuan cau) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: doi ((khi xanh) OR (khia canh)) - canh tranh cua dang cong van ((tuan cau) or (toan tap))*.