CHARLESTON, S.C. (AP) — Thomas Dziagwa wasn’t sure why it took Oklahoma State so long to get going. Once the Cowboys did, Dziagwa and the team put on a stellar performance they hope will pay dividends the rest of the season. Dziagwa had 21 points off a career-best tying seven 3-pointers as Oklahoma State defeated College of Charleston 73-54 on Wednesday night. The Cowboys trailed by nine points…