When the four countries you've gone for have a combined population of less than 25 million, you know you're in trouble. 18. Romania. Have qualified 7 times for a world cup with a best result of quarter-finals in 1994; although they have been absent for the last 20 years, finishing below Poland, Denmark and little Montenegro in the last attempt. Ranked 30th 51. Liechtenstein. 6 attempts, and 6 abject failures. Looked to be having a good campaign in 2006 when they actually managed to win two qualifying matches; but for the 2018 world cup they came away from qualifying with a record of: played 10, lost 10, scored 1, conceded 39. Little hope. Ranked 180th. 118. Swaziland. 7 attempts, and very little show for it. Actually had a good result in the first round of African Qualifying, beating Djibouti 8-1 over two legs. However then they were unlucky to draw Nigeria in the second round, coming away with a fairly creditable 2-0 loss. Ranked 134th. 181. Northern Ireland. 15 attempts & 3 qualifications, reaching a quarter-final in 1958. Although they've not qualified since Mexico 1986, they're undergoing a renaissance of late, finishing second in qualifying ahead of the Czech Republic, and only narrowly losing to Switzerland in the playoffs. Ranked 29th.