duongthang wrote:apart from CR Bible, any one know any book for study CR questions, pls, recommend me. Thank you, my friends. Best regards

hi -

do you have the official guides (yellow 11th edition and purple verbal guide)? those are a good starting point; it's important that you get a feeling for the official problems FIRST, so that, when you're studying other sources, you can get a sense of when those secondary questions aren't similar enough to the official problems.

we (manhattan gmat) also publish separate strategy guides for content sub-areas, of which CR is one: here is the listing on amazon.

best of luck.