In all aspects of CRM search works just from first word.
For example I have Account with name “Pina Co Lada”, and if I write in search: “Lada”, system will not find nothing.
It must me to write: “Pina”. Only in that way I can find account “Pina Co Lada”
The search functionality is currently under appraisal and a more efficient, smarter approach is on the horizon. In the meantime, you can use the percent sign % and this, for example %Lada will match anything that has lada in the name.