lời nói đầu tiênIt would have been 

lời nói đầu tiên

It would have been very difficult to prepare this report if without guidance of lecturer

Kết quả (Anh) 1:

the first wordsIt would have been very difficult to prepare this report if without guidance of lecturer

Kết quả (Anh) 2:

first words It would được very Difficult to prepare this report without guidance of lecturer if