Perhaps you should try some spelling variations:
league robots » league robot, league boots, league robocup
hanoi world » bani world, anti world, hansson world
code league » home league, trade league, code leakage
robots tea » robots ten, robots tele, robots test

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "2018 ((hanoi world) OR (nano world)) code league robots tea".
• Adding a wildcard symbol may retrieve word variants: 2018 ((hanoi world) OR (nano world)) code league robots tea*.