Low resource fix for loose wood planks

I just moved into an apartment with a row of loose wood planks along a central walkway. I'm only going to be here a few months, but I'd like to secure them somehow. Unfortunately for me, this house is in Brazil. Typical hardware stores like Lowe's or Home Depot are nowhere to be found and I don't speak the language well enough to have a conversation with a local hardware guy. There are plenty of Mom & Pop shops around with screws and wood shims, but I only have a very basic set of tools with me (an advanced utility knife). What are some methods to secure the wood blocks but not damage my feet when I walk over them?