A lokacin da aka kewaye Beirut a shekarar 1982, Teresa ta ceci yara 37 da aka kama a asibitin gaba ta hanyar kulla yarjejeniyar tsagaita wuta ta wucin gadi tsakanin sojojin da mayakan Falasdinawa. Tare da rakiyar ma'aikatan Red Cross na Isra'ila, ta yi tafiya ta hanyar yakin zuwa yankin asibiti don kwashe matasa. Lokacin da budewar Turai ta karu a ƙarshen 1980s, Teresa ta faɗaɗa ƙoƙarinta zuwa ƙasashen Kwaminisanci waɗanda 'yan Kwaminisanci suka ƙi, na duniya. A cikin 1996, ta yi tafiya cikin harsuna biyar <unk> Bengali, Albanian, Serbian, Turanci da Hindi <unk> ta yi tafiye-tafiye lokaci-lokaci a waje Indiya don dalilai na jin kai. Ta hanyar murmushi, Teresa ta fara ziyarci ƙasashe 19 da ke aiki a ƙasashen duniya. Ta ziyarci Cibiyar Nazarin Ƙasashen Duniya ta Ƙasar Tarayyar Turai da ke aiki a ƙasashen Afirka ta Kudu a shekara ta 1991, kuma ta ziyarci ƙasashe 450 da ke fama da yunwa. Ta ziyarci Cibiyar Nazarin Ƙasashen Duniya a New York City, Teresa ta yi murmushi kuma ta
zubar da ciki da kuma kisan aure