By ESPNSTAR.com staff
The Oranje raced to a two-goal lead in the first half after goals from Jeremain Lens and Bruno Martins Indi. Ciprian Marica pulled one back for Romania but a goal from Rafael van der Vaart helped the Dutch maintain their lead before a late goal from Eljero Elia sealed the win.
Despite the slew of early goals, Van Gaal felt that his side did not start the game well and were lucky to take a big early lead.
"We did not start so well," he told SBS6, "But luck was on our side. Then we got better in the game and we saw it coming.
"They were incredible goals. Lens' [goal] for example, who never [scores] headers.
"I thought in the first quarter we were restless, which I had not expected. But we had problems getting the ball forward.
"Romania are organised, so maybe that's the excuse. In addition, the stadium was beautiful but the pitch less so."
The former Bayern Munich coach previously criticised Nigel De Jong after his performance in the win against Andorra but took time to praise the Manchester City midfielder this time.
"Nigel de Jong played a very good game," praised the former Bayern Munich trainer.
"He played the ball far better than against Belgium and Andorra.
"Overall I am very happy with the second-half because we killed the game and gave little away."
The win over Romania has opened up a three-point lead for the Netherlands after four games in Group D.