Vendors prepare products at a store painted with Venezuelan and U.S. flags in Maracaibo September 12, 2008. REUTERS/Isaac Urrutia/File PhotoCARACAS/MADRID/NEW YORK, June 15 (Reuters) - Small funds and investors outside the United States are looking to increase their exposure to Venezuelan bonds, on the expectation of debt renegotiations or of legal action tied to a looming expiry of repayment rights, investors and four financial sector sources said.Many of the bonds are trading at pennies on the dollar after a default in 2017, compounded by 2018 sanctions from Washington that barred...