"when combining with" is correct and can be used in written English.
Example: When combining with his natural talent, the athlete's hard work and dedication led him to become a top performer in his sport.
The Victorian pace duo had earlier shared an important 56-run stand during the Australian batting innings and proved equally as effective when combining with ball in hand.
"Nonfarm payrolls were disappointing, but when combining with the rise in self-employed, which include many Internet-based entrepreneurs, the number was very healthy".
But there was no stopping the elusive Manu three minutes later when he powered his way to the line, and Lomax made his first significant contribution when combining with centre Jordan Turner to get Makinson over at the corner.
STAR PLAYER Mesut Ozil: Arsenal's most influential player this season produced another masterclass, providing the corner that Gabriel nodded home for the opener before showing a exquisite touch when combining with Olivier Giroud to finish a dazzling second.
Ozil provided the assist for Gabriel's opener before showing an exquisite touch when combining with Olivier Giroud to score the second as the Gunners recovered from their 4-0 rout at Southampton to move above Leicester into first place.
He did not disappoint in his return, scoring his 50th and 51st international goals and consistently looking dangerous in the second half when combining with Holden in the midfield.
The trend has been devastating when combined with climate change.
When combined with alcohol or dehydration, this can prove fatal.
In fact, ignorance, when combined with curiosity, can be inspiring.
Lycopene is more readily absorbed when combined with oil, so a sauce is ideal.
When combined with his first-class degree, this is tangible evidence of time-management skills.
