Each field is searched by entering the basic regular expression. The 12 characters that make regular expressions work their magic are called metacharacters. If you want your regex to match them literally, you need to escape them by placing a backslash in front of them.
Thus, the regex:    \$   \(   \)   \*   \+   \.   \?   \[   \   \^   \{   \|       matches the text:   $   (   )   *   +   .   ?   [   \   ^   {   |

• Observation start date: Search the Observation Start Date field.

  The date format is 4 digits year, 2 digits month, and 2 digits day. The order is year-month-day
  
  ex) yyyy-mm-dd
  the input data: 2015     matches the text: Observation conditions started in 2015
  the input data: 2015-01     matches the text: observations in January 2015.
  the input data: 03     matches the text: Data with 03 on the start date
  the input data: 2015-06-10     matches the text: Data observed on June 10, 2015
  the input data: (2015-01)|(2016-01)     matches the text: January 2015 and January 2016

• Exper code

  The string entered in the observation code can be searched as a substring.

• Target source name or Coordinate Value

  Target source name is the name of the object to be observed. The string entered in the Target source name can be searched as a substring.

  If the string contains the + character, \ must be prepended to the +.
  ex) If the search string is 0218+357, input search 0218\+357

  Or you can search by the coordinates of right ascension and declination.
  Right ascension ex): 12h30m31.0059000s
  Declination ex): 35d58'29.504510"

  You can also search for the right ascension and declination as a substring.
  Right ascension ex): 12h30m
  Declination ex): 35d58'

• Polarization, Band

  If not check, the entire is the search target. If you check, it searches by 'or' condition.