your daughter’s 7th house of marriage and 8th house of in laws are two most prominent houses in her horoscope. Reason for delay in marriage is
* Jupiter as 7th lord and 10th lord is retrograde in ascendant in nakshatra of Rahu and with Rahu as sublord making it weak as Rahu is placed in 8th house
* Saturn in 7th house delays marriage and adviced to get married around 31 years or so . Also Saturn is afflicting lagna lord Mercury along with Mars is delaying marriage
She is currently under Jup-Jup period from 2/10/2016-20/11/2018 and it shows currently there is a secret love affair going. Saturn return in 7th house from Oct 2017 onwards will open doors for marriage and good chances in Jup-Jup-Moon (7/4/2018 to 11/6/2018) or Jup-Jup-Mar(11/6/2018 to 26/7/2018). Chanting Jupiter Beej mantra 21000 times in 21 days will help massively.
Doing her own business/consultancy will work better. Carrier will get better from Jup-Sat period i.e. 20/11/2018 to 2/6/2021 and will continue well in Jup-Mer period 2/6/2021 to 8/9/2023.