Here are some loan-words written with  ို "o" vowel. 

တိုနီ Tony (Eng)
ဆိုနီ Sony (Eng)
ဗီရို cupboard (Pali)
ဆိုကရေးတီး Socrates (Eng)
ဟိုတယ် hotel (Eng)


Notice the weakened vowels and voiced consonants while you are listening to the reading lessons.

When you come across the "o" vowel with ယ် "yá thaq" or လ် "lá thaq" attached next to it like in ကိုယ်  [ko] and ကုသိုလ် [kù dho], you will not read "yá thaq" and "lá thaq" at all.