Regular Expressions 101

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~
(?:адресу?|место(?:положение|нахождение)):?[^+\n]
~
gm
Non-capturing group
(?:адресу?|место(?:положение|нахождение))
1st Alternative
адресу?
адрес matches the characters адрес literally (case sensitive)
у
matches the character у literally (case sensitive)
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
2nd Alternative
место(?:положение|нахождение)
место matches the characters место literally (case sensitive)
Non-capturing group
(?:положение|нахождение)
1st Alternative
положение
положение matches the characters положение literally (case sensitive)
2nd Alternative
нахождение
нахождение matches the characters нахождение literally (case sensitive)
:
matches the character : literally (case sensitive)
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
Match a single character not present in the list below
[^\n]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
\n matches a line-feed (newline) character (ASCII 10)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

~
~
gm

Test String