like: hạ tầng cơ sở
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Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
hạ tầng cơ sở * ☊ 
basis, foundation * ☊
[ hạ ] : (1) summer; (2) to lower, let down (price, flag); to land (a plane)
[ tầng ] : story, floor layer, stratum, stage (of a rocket)
[ cơ ] : (1) foundation; (2) occasion, opportunity, circumstance; (3) odd; (4) regiment; (5) machine, mechanism, motor, engine; (6) airplane; (7) hunger, famine; (8) muscle; (9) outburst, crisis
[ sở ] : office, place (of work)