A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

have trouble to do something • take the trouble to
do something
have trouble to do something —experience serious problems
or difficulties when doing smth.: People with poor vision,
though not blind, have trouble to read small fonts.
take the trouble to do something— make an effort to accom-
plish smth.: It has been instructive to discover enthusiastic
assistance available if I only take the trouble to ask.
have trouble over something • take trouble over
something
have trouble over something —(also: have trouble with some-
thing) experience serious problems or difficulties when dealing
with smth.: I have trouble over my mid-morning bathes on
account of passing boats.
take trouble over something —(also: take trouble with some-
thing) exercise care and thoroughness about smth.: The
numerous finds of glass vessels show that Meroitic ladies took
considerable trouble over their appearance.
have two faces • wear two hats
have two faces —(also: have two faces under a hood) 
1
. be
deceitful or insincere in one’s behavior: The woman had two
faces: the one she used with clients, who adored her, and an -
other for the office. 2. have two different aspects: Psychiatry
has two faces, one represented by treatment at the psychosocial
level and the other by treatment at the pharmacologic level.
Note: 
a) The expression does not correlate in meaning with
the phrase be like a dog with two tails—(coll.) be extremely
happy: I am not used to being home; husband is like a dog
with two tails, and his excitement at having me here is starting
to annoy me.
b) The expression does not correlate in meaning with the phrase
have two strings to one’s bow
— have two alternative courses
open: A dual honors degree has a number of advantages: When
deciding on a career, you will have two strings to your bow.
wear two hats— hold two official appointments at the same
time; have two sets of responsibilities: Because I breed race-
horses, I also am a farmer so I wear two hats.