gěi nǐ tiān má fan le bǐ pǔtōng xièxie gèng zhòng shìhé biérén wèi nǐ duō zuò le yī bù huā le éwài shíjiān huòzhě bāng nǐ shōushi le wèntí

“给你添麻烦了”比普通谢谢更重，适合别人为你多做了一步、花了额外时间，或者帮你收拾了问题。

'Sorry to trouble you' is stronger than a simple thanks; it's suitable when someone has gone an extra step, spent extra time, or helped you clean up a problem.