Anticoagulation

"Anticoagulants"[Mesh] OR "Fibrinolytic Agents"[Mesh] OR "Platelet Aggregation Inhibitors"[Mesh] OR "Thrombolytic Therapy"[Mesh]

If you are really short of results, you can also try these:

"Anticoagulants"[Pharmacological Action] OR"Fibrinolytic Agents"[Pharmacological Action] OR "Platelet Aggregation Inhibitors"[Pharmacological Action]

Delayed onset or presentation

MeSH:
Delayed Diagnosis
Age of Onset
Time Factors
Delayed-Action Preparations
Delayed Emergence from Anesthesia
Hypersensitivity, Delayed
Prenatal Exposure Delayed Effects
Embryo Implantation, Delayed
Puberty, Delayed
Delayed Graft Function

EMBASE:
delayed diagnosis
time
delayed neurotoxicity
(others, more specific)  ***check these next time in EMBASE

Keywords:
delay*
late
onset

Traffic accident or Motor Vehicle Accident

The Mesh term "Accidents, Traffic"[Mesh] is usually pretty good for this, but here's some more:

"Motor Vehicles"[Mesh:NoExp] OR "Automobiles"[Mesh] OR "Motorcycles"[Mesh] OR "Off-Road Motor Vehicles"[Mesh] OR "Automobile Driving"[Mesh]

Why, you ask, did I not explode Motor Vehicles, rather than writing out almost all of the narrower terms? It's because of the one narrower term which I did not include, which is Ambulances. If the other part of your search (probably something like low back pain, whiplash, trauma, soft tissue injuries, etc...) has anything to do with something a paramedic might look at (which is basically everything), then that one MeSH could mess up your search something fierce.

It might also be helpful to combine your "Motor Vehicles" search with the keywords about accidents below, to avoid articles about the long term effects of sitting at the wheel.

These may also be useful:
"Seat Belts"[Mesh] OR "Air Bags"[Mesh]

Keywords:
traffic*[tiab] OR vehic*[tiab] OR car[tiab] OR cars[tiab] OR truck*[tiab] OR road*[tiab] OR transport*[tiab] OR automobile*[tiab] OR lorr*[tiab] OR passenger*[tiab] OR off-road[tiab] OR driving[tiab] OR driver*[tiab] OR motorist*[tiab] OR motorcar*[tiab] OR "high energy"[tiab]
AND
accident*[tiab] OR collision*[tiab] OR collide*[tiab] OR crash*[tiab] OR prang*[tiab] OR wreck*[tiab] OR smash*[tiab]
NOT
trafficking[tiab] 


PsycInfo:
DE "Transportation Accidents" OR DE "Motor Traffic Accidents" OR DE "Pedestrian Accidents"
There also exists DE "Air Traffic Accidents", if it is helpful

EMBASE:
exp traffic accident/

Tendon Grafts

"Tendon Transfer"[Mesh] OR "Transplants"[Mesh] OR "Transplantation"[Mesh] OR transplantation[subheading]
AND
(Mesh and keywords about particular tendon(s))

If you are looking for information about the site where the graft is taken from, the following is also available:
"Tissue and Organ Harvesting"[Mesh] OR harvest*[tiab]