mở mang bờ cõi 
to expand one’s borders [ mở ] : to open, start, begin, turn on, set up
[ mang ] : to carry, wear, bear
[ bờ ] : shore, bank, fence, rim, edge, border, limit, side
[ cõi ] : world, area, extent, country, region
Most Common Compounds Set 1:
Most Common Compounds Set 2 :