2 sentences for 小意思 (xiǎo​yì​si)

1. 这种小事对他来说简直是小意思。

   zhè zhǒng xiǎo​shì duì tā lái shuō jiǎn​zhí shì xiǎo​yì​si.

   This kind of trifle is a piece of cake for him.

   Source: Dong Chinese Dictionary

2. 这是一点小意思，不成敬意，请您收下。

   zhè shì yī​diǎn xiǎo​yì​si, bù chéng jìng​yì, qǐng nín shōu​xià.

   This is just a small token of my regard; please accept it.

   Source: Dong Chinese Dictionary