Hello Guest

1. 'In search of' means 'looking for', e.g.

'I went in search of a beer.' = 'I went looking for a beer.'

2. 'To search for' means 'to look thoroughly for', e.g.

'I searched for a beer in the fridge.'

You can also say ['search' + object + 'for'], e.g.

'I searched the fridge for a beer.'

3. 'Advice to'/'Advice for'

You give 'advice to' someone, e.g.

'My advice to you, young man, is to search for a beer.'
'He gave some good advice to the thirsty young man.'

You compile 'advice for' someone, e.g.

'My forthcoming book is full of good advice for the beerless.'

MrP