You cannot enter the States "looking for a job" actually, if during a
TN interview they ask "how did you get this job, or hear about it?" never ever ever say you got it when visiting the US.
Also be careful with your terminology.
In your post you say: "I know I can live in the states up to half a year." That is actually false. You MAY enjoy the PRIVILEGE of VISITING the US for up to 6 months. But you cannot live in the States for up to 6 months. The key word here is VISIT. Also, always remember you have no rights. The officer may allow you certain privileges, but is not obliged to let you enter for 6 months.