Police continue to scour bushland in Melbourne's outer north for any sign of missing mother Ju "Kelly" Zhang.
Ms Zhang, the mother of an eight-year-old boy, has not been seen since leaving her home in Epping on February 1.
An area of bushland and Darebin Creek west of Sheehan Road are the focus of detectives' search on Monday, with other police squads called in to help.
Police have already searched the creek's parklands at Ivanhoe West as part of their investigation.
It comes as police renew their appeal for an anonymous caller to Crime Stoppers last week to make contact again.
The caller provided details of the 33-year-old's location and detectives are seeking further information from them.
Ms Zhang was wearing a pink nightgown and possibly pink slippers when she was last seen.
A friend reported her missing to police the next day.
Ms Zhang was in a relationship with Doncaster man Joon Seong Tan, 35, who was arrested at Melbourne Airport on February 10 after he allegedly tried to leave the country.
He was charged with murder and will face court again on July 16.
