SQL & PL/SQL :: Unable To Retrieve Multiple Values / Possibility From A Table?

I have a table called table1 and its structure is as follows:

rtrn_id number,
entp_abn number,
litm_line_item_nbr number
country_code varchar 2(10)

I am trying to find retrieve value/row where for a particular rtrn_id , the possibility of having a country code of "CA"(for Canada) and "US" or "HK" (US or Hong Kong respectively) exists.

I framed my query the following way and it does not retrieve any result in Production and I believe there are a few values/rows in the "table1".

The query framed is:

Query 1:

SELECT rtrn_id,entp_abn,litm_line_item_nbr,country_code
FROM table1
where schd_version_yr = 2010 and prog_program_cd = '01'
and sched_nbr = '000' and (litm_line_item_nbr = '023' and country_code 'CA')
and (litm_line_item_nbr = '016' and country_code = 'CA')

The above query does not retrieve any rows

Where as if I run a query individually it retrieves tons of rows

(Individual query :

SELECT rtrn_id,entp_abn,litm_line_item_nbr,country_code
FROM table1
where schd_version_yr = 2010
and prog_program_cd = '01'
and sched_nbr = '000'
and (litm_line_item_nbr = '016' and country_code = 'CA')

-----Retrieves tons of rows as the country code = Canada for line item # 16

SELECT rtrn_id,entp_abn,litm_line_item_nbr,country_code
FROM table1
where schd_version_yr = 2010
and prog_program_cd = '01'
and sched_nbr = '000'
and (litm_line_item_nbr = '016' and country_code 'CA')

-----Retrieves tons of rows as the country code IS NOT Canada for line item # 23.

There is a possibility that there are rows that have country Code as Canada and not Canada for a particular ID whose line item numbers could be 16, 23.. is there any better way to frame my Query1 to retrieve values/rows?