1{{Str find|chữ|sub_string}} = Position of first appearance of sub_string in chữ.In the examples, the string to be searched is Abcdefghijklm:Dữ liệu bản mẫu cho Str findA template to find the numeric position of first appearance of ''sub_string'' in ''text''Tham số bản mẫuThe text to search withinThe string to be searched within the text