Perhaps you should try some spelling variations:
"using computational tools modelling problems" » "and computational tools modelling problems" (Expand search), "using computational tool modelling problems" (Expand search), "using computational biology modelling problems" (Expand search), "using computational tools modelling process" (Expand search), "using computational tools solving problems" (Expand search), "using computational tools covering problems" (Expand search), "using computational tools modeling problems" (Expand search), "using computational rolls modelling problems" (Expand search), "using computational floods modelling problems" (Expand search)
"using population in coding program" » "aging population in coding program" (Expand search), "ageing population in coding program" (Expand search), "young population in coding program" (Expand search), "using population in cloning program" (Expand search), "using population in loading program" (Expand search), "using population in cooling programs" (Expand search), "using population on coding program" (Expand search), "using population in decoding program" (Expand search), "using population non coding program" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational tools modelling problems\") OR (\"using population in coding program\"))~".
• Removing quotes may allow a broader search: (( using computational tools modelling problems ) OR ( using population in coding program ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational tools modelling problems") OR ("using population in coding program"))*.